Items where Author is "Koch, Andreas"
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Koch, Andreas and Cote, Patrick (2017) Galactic Pal-eontology : abundance analysis of the disrupted globular cluster Palomar 5. Astronomy and Astrophysics, 601: A41. ISSN 1432-0746
Koch, Andreas and Black, Christine S. and Rich, R. Michael and Longstaff, Francis A. and Collins, Michelle L. M. and Janz, Joachim (2017) Another look at the size of the low-surface brightness galaxy VCC 1661 in the Virgo Cluster. Astronomical Notes / Astronomische Nachrichten, 338 (4). pp. 503-509. ISSN 0004-6337
Rich, R. Michael and Brosch, Noah and Bullock, James and Burkert, Andreas and Collins, Michelle L. M. and de Groot, Laura and Kennefick, Julia and Koch, Andreas and Longstaff, Francis A. and Sales, Laura (2017) The Halos and Environments of Nearby Galaxies (HERON) Survey. Proceedings of the International Astronomical Union, 11 (S321). pp. 186-189. ISSN 1743-9213
Hanke, M. and Koch, Andreas and Hansen, C.J. and McWilliam, A. (2017) Insights into the chemical composition of the metal-poor Milky Way halo globular cluster NGC 6426. Astronomy and Astrophysics, 599: A97. ISSN 1432-0746
Hollyhead, K. and Kacharov, N. and Lardo, C. and Bastian, N. and Hilker, M. and Rejkuba, M. and Koch, Andreas and Grebel, E.K. and Georgiev, I. (2017) Evidence for multiple populations in intermediate age cluster Lindsay 1 in the SMC. Monthly Notices of the Royal Astronomical Society, 465 (1). L39-L43. ISSN 0035-8711
Pancino, E. and Koch, Andreas (2017) The Gaia ESO survey : calibration strategy. Astronomy and Astrophysics, 598: A5. ISSN 1432-0746
Hansen, C.J. and Jofre, P. and Koch, Andreas and McWilliam, A. and Sneden, C.S. (2017) Something borrowed, something blue : the nature of blue metal-poor stars inferred from their colours and chemical abundances. Astronomy and Astrophysics, 598: A54. ISSN 1432-0746
Caffau, E. and Bonifacio, P. and Spite, M. and Spite, F. and Monaco, L. and Sbordone, L. and Francois, P. and Gallagher, A. and Plez, B. and Zaggia, S. and Ludwig, H.-G. and Cayrel, R. and Koch, Andreas and Steffen, M. and Salvadori, S. and Klessen, R.S. and Glover, S. and Christlieb, N. (2016) TOPoS: III. An ultra iron-poor CEMP multiple system. Astronomy and Astrophysics, 595: L6. ISSN 1432-0746
Koch, Andreas and McWilliam, Andrew and Preston, George W. and Thompson, Ian P. (2016) Metal-poor stars towards the Galactic bulge : a population potpourri. Astronomy and Astrophysics, 587: A124. ISSN 1432-0746
Martin, Nicolas F. and Ibata, Rodrigo A. and Collins, Michelle L. M. and Rich, R. Michael and Bell, Eric F. and Ferguson, Annette M. N. and Laevens, Benjamin P. M. and Rix, Hans-Walter and Chapman, Scott C. and Koch, Andreas (2016) Triangulum II : a very metal-poor and dynamically hot stellar system. The Astrophysical Journal, 818 (1): 40. ISSN 0004-637X
Hendricks, Benjamin and Boeche, Corrado and Johnson, Christian I. and Frank, Matthias J. and Koch, Andreas and Mateo, Mario and Bailey III, John I. (2016) Evidence for a chemical enrichment coupling of globular clusters and field stars in the Fornax dSph. Astronomy and Astrophysics, 585: A86. ISSN 1432-0746
Koch, Andreas and Frank, Matthias J. and Pasquali, Anna and Rich, R. Michael and Rabitz, Andreas (2015) Major mergers with small galaxies : the discovery of a Magellanic-type galaxy at z=0.12. The Astrophysical Journal, 815 (2): 105. ISSN 0004-637X
Hansen, C. J. and Ludwig, H.-G. and Seifert, W. and Koch, Andreas and Xu, W. and Caffau, E. and Christlieb, N. and Korn, A. J. and Lind, K. and Sbordone, L. and Ruchti, G. R. and Feltzing, S. and De jong, R. S. and Barden, S. and Schnurr, O. (2015) Stellar science from a blue wavelength range : a possible design for the blue arm of 4MOST. Astronomical Notes / Astronomische Nachrichten, 336 (7). pp. 665-676. ISSN 0004-6337
Frank, Matthias J. and Koch, Andreas and Feltzing, S. and Kacharov, N. and Wilkinson, Mark I. and Irwin, Mike (2015) Strömgren uvby photometry of the peculiar globular cluster NGC 2419. Astronomy and Astrophysics, 581: A72. ISSN 1432-0746
Kunder, Andrea and Rich, R. M. and Hawkins, K. and Poleski, R. and Storm, J. and Johnson, C. I. and Shen, J and Li, Z.-y. and Cordero, M. J. and Nataf, D. M. and Bono, G. and Walker, A. R. and Koch, Andreas and Propris, R. De and Udalski, A. and Szymanski, M. K. and Soszynski, I. and Pietrzynski, G. and Ulaczyk, K. and Wyrzykowski, L. and Pietrukowicz, P. and Skowron, J. and Kozłowski, S. and Mróz, P. (2015) A high-velocity bulge RR Lyrae variable on a halo-like orbit. Astrophysical Journal Letters, 808 (1): L12. ISSN 2041-8205
Koch, Andreas and Danforth, Charles W. and Rich, R. Michael and Ibata, Rodrigo A. and Keeney, Brian A. (2015) A detection of gas associated with the M31 Stellar Stream. The Astrophysical Journal, 807 (2): 153. ISSN 0004-637X
Bonifacio, P. and Caffau, E. and Spite, M. and Limongi, M. and Chieffi, A. and Klessen, R. S. and Francois, P. and Molaro, P. and Ludwig, H.-G. and Zaggia, S. and Spite, F. and Plez, B. and Cayrel, R. and Christlieb, N. and Clark, P. C. and Glover, S. C. O. and Hammer, F. and Koch, Andreas and Monaco, L. and Sbordone, L. and Steffen, M. (2015) TOPoS : on the bimodality of carbon abundance in CEMP stars Implications on the early chemical evolution of galaxies. Astronomy and Astrophysics, 579: A28. ISSN 1432-0746
Kacharov, N. and Koch, Andreas and Caffau, E. and Sbordone, L. (2015) Galactic evolution of sulphur as traced by globular clusters. Astronomy and Astrophysics, 577: A18. ISSN 1432-0746
Ural, Uğur and Cescutti, Gabriele and Koch, Andreas and Kleyna, Jan and Feltzing, S. and Wilkinson, Mark I. (2015) An inefficient dwarf : Chemical abundances and the evolution of the Ursa Minor dwarf spheroidal galaxy. Monthly Notices of the Royal Astronomical Society, 449 (1). pp. 761-770. ISSN 0035-8711
Crnojevic, D. and Grebel, E.K. and Ferguson, Annette M. N. and Koch, Andreas and Rejkuba, M. and Da Costa, G. and Jerjen, H. and Irwin, Michael J. and Bernard, E. J. and Arimoto, Nobuo and Jablonka, P. and Kobayashi, Chiaki (2015) Galaxy evolution through resolved stellar populations in the nearby Centaurus A group. Memorie della Societa Astronomica Italiana, 86. pp. 302-305. ISSN 0037-8720
Hendricks, Benjamin and Koch, Andreas and Walker, Matthew and Johnson, Christian I. and Penarrubia, J. and Gilmore, Gerard (2014) Insights from the outskirts : chemical and dynamical properties in the outer parts of the Fornax dwarf spheroidal galaxy. Astronomy and Astrophysics, 572: A82. ISSN 1432-0746
Koch, Andreas and Rich, R. Michael (2014) A chemical confirmation of the faint Boötes II dwarf Spheroidal Galaxy. The Astrophysical Journal, 794 (1): 89. ISSN 0004-637X
Johnson, Christian I. and Rich, R. Michael and Kobayashi, Chiaki and Kunder, Andrea and Koch, Andreas (2014) Light, Alpha, and Fe-peak element abundances in the Galactic bulge. The Astronomical Journal, 148 (4): 67. ISSN 0004-6256
Kacharov, N. and Bianchini, P. and Koch, Andreas and Frank, M. J. and Martin, N. F. and van de Ven, G. and Puzia, T. H. and McDonald, I. and Johnson, C. I. and Zijlstra, A. A. (2014) A study of rotating globular clusters : the case of the old, metal-poor globular cluster NGC 4372. Astronomy and Astrophysics, 567: A69. ISSN 1432-0746
Koch, Andreas and McWilliam, Andrew (2014) The chemical composition of a regular halo globular cluster : NGC 5897. Astronomy and Astrophysics, 565: A23. ISSN 1432-0746
Hendricks, Benjamin and Koch, Andreas and Lanfranchi, Gustavo A. and Boeche, Corrado and Walker, Matthew and Johnson, Christian I. and Penarrubia, J. and Gilmore, Gerard (2014) The metal-poor knee in the Fornax dwarf spheroidal galaxy. The Astrophysical Journal, 785 (2): 102. ISSN 0004-637X
Pasquini, L. and Koch, Andreas and Smiljanic, R. and Bonifacio, P. and Modigliani, A. (2014) The Be-test in the Li-rich star #1657 of NGC 6397 : evidence for Li-flash in RGB stars? Astronomy and Astrophysics, 563: A3. ISSN 1432-0746
Collins, Michelle L. M. and Chapman, Scott C. and Rich, R. M. and Ibata, Rodrigo A. and Martin, Nicolas F. and Irwin, Michael J. and Bate, Nicholas F. and Lewis, Geraint F. and Peñarrubia, Jorge and Arimoto, Nobuo and Casey, Caitlin M. and Ferguson, Annette M. N. and Koch, Andreas and McConnachie, Alan W. and Tanvir, Nial (2014) The masses of local group dwarf spheroidal galaxies : the death of the universal mass profile. The Astrophysical Journal, 783 (1): 7. ISSN 0004-637X
Koch, Andreas (2014) Blanco DECam Bulge Survey (BDBS) : current status and progress. Bulletin of the American Astronomical Society, 224: 319.01. ISSN 2330-9458
Koch, Andreas (2014) The Blanco DECam Bulge Survey (BDBS) : status and early results. Bulletin of the American Astronomical Society, 223: 346.19. ISSN 2330-9458
Koch, Andreas (2014) Searching for stellar sub-structure in the Galactic bulge. Bulletin of the American Astronomical Society, 223: 442.04. ISSN 2330-9458
Koch, Andreas and Hansen, Terese and Feltzing, S. and Wilkinson, Mark I. (2013) A spectroscopic binary in the Hercules dwarf spheroidal galaxy. The Astrophysical Journal, 780 (1): 91. ISSN 0004-637X
Kacharov, N. and Koch, Andreas and McWilliam, A. (2013) A comprehensive chemical abundance study of the outer halo globular cluster M 75. Astronomy and Astrophysics, 554: A81. ISSN 1432-0746
Koch, Andreas and Feltzing, S. and Adén, D. and Matteucci, F. (2013) Neutron-capture element deficiency of the Hercules dwarf spheroidal galaxy. Astronomy and Astrophysics, 554: A5. ISSN 1432-0746
Collins, Michelle L. M. and Chapman, Scott C. and Rich, R. Michael and Ibata, Rodrigo A. and Martin, Nicolas F. and Irwin, Michael J. and Bate, Nicholas F. and Lewis, Geraint F. and Peñarrubia, Jorge and Arimoto, Nobuo and Casey, Caitlin M. and Ferguson, Annette M. N. and Koch, Andreas and McConnachie, Alan W. and Tanvir, Nial (2013) A kinematic study of the Andromeda dwarf spheroidal system. The Astrophysical Journal, 768 (2): 172. ISSN 0004-637X
Johnson, Christian I. and Rich, R. Michael and Kobayashi, Chiaki and Kunder, Andrea and Pilachowski, Catherine A. and Koch, Andreas and Propris, R. De (2013) Metallicity distribution functions, radial velocities, and alpha element abundances in three off-axis bulge fields. The Astrophysical Journal, 765 (2): 157. ISSN 0004-637X
Lianou, S. and Grebel, E.K. and Da Costa, G. S. and Rejkuba, M. and Jerjen, H. and Koch, Andreas (2013) Population gradients and photometric metallicities in early- and transition-type dwarf galaxies : clues from the Sculptor group. Astronomy and Astrophysics, 550: A7. ISSN 1432-0746
Hyde, E. A. and Zucker, D. B. and Keller, S. and Siebert, A. and Ibata, Rodrigo A. and Penarrubia, J. and Martell, S. and Lewis, G. and Irwin, M. and Koch, Andreas (2013) Selecting Sagittarius : a study of Sagittarius dwarf members throughout the Milky Way Galactic halo. Bulletin of the American Astronomical Society, 221: 425.03. ISSN 2330-9458
Kacharov, N. and Koch, Andreas (2013) An abundance study of the outer halo globular cluster M75. Memorie della Societa Astronomica Italiana, 84. p. 224. ISSN 0037-8720
Koch, Andreas and Frank, M. J. and Feltzing, S. and Adén, D. and Kacharov, N. and Wilkinson, M. I. (2013) An intermediate-band photometric study of the “Globular Cluster” NGC 2419. Memorie della Societa Astronomica Italiana, 84. p. 67. ISSN 0037-8720
Schaul, D. and Rich, R.M. and Black, C.S. and Reitzel, D. B. and Collins, M.L.M. and Koch, Andreas and Longstaff, F.A. and Benson, A. (2013) The local universe at 30 mag/sq. arcsec : extended stellar halos around near-by galaxies. Bulletin of the American Astronomical Society, 221: 146.01. ISSN 2330-9458
Black, C.S. and Koch, Andreas and Rich, R. M. and Longstaff, F.A. and Collins, M.L.M. and Lisker, T. and Janz, J. (2013) A new, smaller size for the low-surface brightness galaxy VCC 1661 in the Virgo Cluster. Bulletin of the American Astronomical Society, 221: 436.01. ISSN 2330-9458
Haschke, Raoul and Grebel, E.K. and Frebel, Anna and Duffau, Sonia and Hansen, Camilla Juul and Koch, Andreas (2012) Chemical abundances of metal-poor RR Lyrae stars in the Magellanic Clouds. The Astronomical Journal, 144 (3): 88. ISSN 0004-6256
Koch, Andreas and Burkert, A. and Rich, R. Michael and Collins, Michelle L. M. and Black, Christine S. and Hilker, M. and Benson, Andrew J. (2012) Threshing in action : the tidal disruption of a dwarf galaxy by the Hydra I cluster. Astrophysical Journal Letters, 755 (1): L13. ISSN 2041-8205
Salucci, Paolo and Wilkinson, Mark I. and Walker, Matthew and Gilmore, Gerard and Grebel, E.K. and Koch, Andreas and Martins, Christiane Frigerio and Wyse, F. G. (2012) Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws. Monthly Notices of the Royal Astronomical Society, 420 (3). pp. 2034-2041. ISSN 0035-8711
Rich, R. Michael and Collins, Michelle L. M. and Black, C. M. and Longstaff, F.A. and Koch, Andreas and Benson, Andrew J. and Reitzel, D. B. (2012) A tidally distorted dwarf galaxy near NGC 4449. Nature, 482 (7384). pp. 192-194. ISSN 0028-0836
Kunder, Andrea and Koch, Andreas and Rich, R. Michael and Propris, Roberto de and Howard, Christian D. and Stubbs, Scott A. and Johnson, Christian I. and Shen, Juntai and Wang, Yougang and Robin, Annie C. and Kormendy, John and Soto, Mario and Frinchaboy, Peter and Reitzel, David B. and Zhao, HongSheng and Origlia, Livia (2012) The Bulge Radial Velocity Assay (BRAVA) : II. Complete sample and data release. The Astronomical Journal, 143 (3): 57. ISSN 0004-6256
Rich, R.M. and Kunder, Andrea and Propris, Roberto de and Koch, Andreas (2012) The Bulge Radial Velocity Assay (BRAVA) : final results, a new high velocity star, and public data release. Bulletin of the American Astronomical Society, 219: 252.02. ISSN 0002-7537
Koch, Andreas (2012) The Gaia-ESO Public Spectroscopic Survey. The Messenger, 147. pp. 25-31.
Kacharov, N. and Koch, Andreas (2012) Precise abundance analysis of the outer halo globular cluster M 75. AIP Conference Proceedings, 1480. p. 385. ISSN 0094-243X
Koch, Andreas and Matteucci, F. and Feltzing, S. (2012) Small-scale hero : massive-star enrichment in the Hercules dwarf spheroidal. AIP Conference Proceedings, 1480. p. 190. ISSN 0094-243X
Johnson, C. I. and Rich, R.M. and Kunder, Andrea and Propris, Roberto de and Kobayashi, Chiaki and Koch, Andreas (2012) The chemical composition of RGB stars in off-axis bulge field. Bulletin of the American Astronomical Society, 219: 152.11. ISSN 0002-7537
Koch, Andreas and Lépine, Sébastien and Çalışkan, Ş. (2012) The puzzling assembly of the Milky Way halo : contributions from dwarf Spheroidals and globular clusters. EPJ Web of Conferences, 19: 03002. ISSN 2100-014X
Koch, Andreas and Lind, K. and Thompson, I. B. and Rich, R.M. (2012) A super-Li rich turnoff star in NGC 6397 : the puzzle persists. Memorie della Societa Astronomica Italiana, 22. p. 79. ISSN 0037-8720
Lépine, Sébastien and Koch, Andreas and Rich, R. Michael and Kuijken, Konrad (2011) A first measurement of the proper motion of the Leo II dwarf spheroidal galaxy. The Astrophysical Journal, 741 (2): 100. ISSN 0004-637X
Koch, Andreas and Caffau, E. (2011) Sulphur in the metal poor globular cluster NGC 6397. Astronomy and Astrophysics, 534: A52. ISSN 1432-0746
Koch, Andreas and Lind, Karin and Rich, R. Michael (2011) Discovery of a super-Li-rich turnoff star in the metal-poor globular cluster NGC 6397. Astrophysical Journal Letters, 738 (2): L29. ISSN 2041-8205
Koch, Andreas and McWilliam, Andrew (2011) A differential chemical element analysis of the metal-poor globular cluster NGC 6397. The Astronomical Journal, 142 (2): 63. ISSN 0004-6256
Lianou, S. and Grebel, E.K. and Koch, Andreas (2011) Spectroscopic versus photometric metallicities : Milky Way dwarf spheroidal companions as a test case. Astronomy and Astrophysics, 531: A152. ISSN 1432-0746
Propris, Roberto De and Rich, R. Michael and Kunder, Andrea and Johnson, Christian I. and Koch, Andreas and Brough, Sarah and Conselice, Christopher J. and Gunawardhana, Madusha and Palamara, David and Pimbblet, Kevin and Wijesinghe, Dinuka (2011) Separating the conjoined red clump in the Galactic bulge : kinematics and abundances. Astrophysical Journal Letters, 732 (2): L36. ISSN 2041-8205
Kunder, Andrea and Propris, Roberto de and Rich, R.M. and Koch, Andreas (2011) The Bulge Radial Velocity Assay : new observations and results. Bulletin of the American Astronomical Society, 217: 241.12. ISSN 0002-7537
Crnojevic, D. and Grebel, E. K. and Cole, A. A. and Koch, Andreas and Rejkuba, M. and Costa, Gary Da and Jerjen, H. (2011) Dwarf galaxies beyond Our doorstep : the Centaurus Group. EAS Publications Series, 48. pp. 51-57. ISSN 1633-4760
Lianou, S. and Grebel, E.K. and Koch, Andreas (2011) M 81 group dSphs : metallicity distribution functions and gradients. EAS Publications Series, 48. pp. 91-92. ISSN 1633-4760
Hyde, E. A. and Zucker, D. B. and Peñarrubia, J. and Irwin, M. and Lane, R. and Lewis, G. F. and Gilmore, G. and Koch, Andreas (2011) Was the progenitor of the Sagittarius Stream a disc galaxy? : Recent results & observations. Bulletin of the American Astronomical Society, 217: 152.28. ISSN 0002-7537
Lianou, S. and Grebel, E.K. and Koch, Andreas (2010) Dwarf spheroidals in the M81 Group : metallicity distribution functions and population gradients. Astronomy and Astrophysics, 521: A43. ISSN 1432-0746
Glatt, K. and Grebel, E.K. and Koch, Andreas (2010) Ages and luminosities of young SMC/LMC star clusters and the recent star formation history of the Clouds. Astronomy and Astrophysics, 517: A50. ISSN 1432-0746
Koch, Andreas and Côté, P. (2010) Chemical abundances for the outer halo cluster Pal 4 from co-added high-resolution spectroscopy. Astronomy and Astrophysics, 517: A59. ISSN 1432-0746
Crnojevic, D. and Grebel, E.K. and Koch, Andreas (2010) A close look at the Centaurus A group of galaxies : I. Metallicity distribution functions and population gradients in early-type dwarfs. Astronomy and Astrophysics, 516: A85. ISSN 1432-0746
Koch, Andreas and McWilliam, Andrew (2010) A differential chemical abundance scale for the globular cluster M5. The Astronomical Journal, 139 (6). pp. 2289-2299. ISSN 0004-6256
Koch, Andreas and Rich, R. Michael (2010) A statistical analysis of the late-type stellar content in the Andromeda Halo. The Astronomical Journal, 139 (6). pp. 2279-2288. ISSN 0004-6256
Quinn, D. P. and Wilkinson, M. I. and Irwin, Michael J. and Marshall, J. and Koch, Andreas and Belokurov, V. (2010) Dark matter constraints from wide halo binary stars. ASP Conference Series, 435. pp. 453-456. ISSN 1050-3390
Lianou, S. and Grebel, E. K. and Koch, Andreas (2010) Dwarf spheroidals in the M81 galaxy group. ASP Conference Series, 424. pp. 242-243. ISSN 1050-3390
Rich, R. M. and Shen, J and Howard, Christian D. and Propris, Roberto de and Koch, Andreas and Reitzel, D. B. (2010) Striking agreement between galactic bulge kinematics from the BRAVA survey, and an N-body bar. Bulletin of the American Astronomical Society, 215: 321.06. ISSN 0002-7537
Ural, Uğur and Wilkinson, Mark I. and Koch, Andreas and Gilmore, Gerard and Beers, Timothy C. and Belokurov, V. and Wyn Evans, N. and Grebel, E.K. and Vidrih, Simon and Zucker, D. B. (2009) Kinematic subpopulations in dwarf spheroidal galaxies. Monthly Notices of the Royal Astronomical Society, 402 (2). pp. 1357-1368. ISSN 0035-8711
Crnojevic, D. and Grebel, E. K. and Koch, Andreas (2009) Evolution of dwarf galaxies in the Centaurus A group. Astronomical Notes / Astronomische Nachrichten, 330 (9-10). pp. 1001-1003. ISSN 0004-6337
Adén, D. and Wilkinson, M. I. and Read, J. I. and Feltzing, S. and Koch, Andreas and Gilmore, G. F. and Grebel, E.K. and Lundström, I. (2009) A new low mass for the Hercules dSph : the end of a common mass scale for the dwarfs? Astrophysical Journal Letters, 706 (1). L150-L154. ISSN 2041-8205
Koch, Andreas and Côté, P. and McWilliam, A. (2009) All quiet in the outer halo : chemical abundances in the globular cluster Pal 3. Astronomy and Astrophysics, 506 (2). pp. 729-743. ISSN 1432-0746
Glatt, Katharina and Grebel, Eva K. and Gallagher III, John S. and Nota, Antonella and Sabbi, Elena and Sirianni, Marco and Clementini, Gisella and Costa, Gary Da and Tosi, Monica and Harbeck, Daniel and Koch, Andreas and Kayser, Andrea (2009) Structural parameters of seven small magellanic cloud intermediate-age and old star clusters. The Astronomical Journal, 138 (5). pp. 1403-1416. ISSN 0004-6256
Quinn, D. P. and Wilkinson, M. I. and Irwin, Michael J. and Marshall, J. and Koch, Andreas and Belokurov, V. (2009) On the reported death of the MACHO era. Monthly Notices of the Royal Astronomical Society: Letters, 396 (1). L11-L15. ISSN 1745-3925
Koch, Andreas and Wilkinson, Mark I. and Kleyna, Jan and Irwin, Mike and Zucker, D. B. and Belokurov, V. and Gilmore, Gerard and Fellhauer, Michael and Wyn Evans, N. (2009) A spectroscopic confirmation of the Bootes II dwarf spheroidal. The Astrophysical Journal, 690 (1). pp. 453-462. ISSN 0004-637X
Lianou, S. and Grebel, E. K. and Koch, Andreas (2009) Dwarf spheroidal galaxies in the M81 group of galaxies. Astronomical Notes / Astronomische Nachrichten, 330 (9-10). pp. 995-997. ISSN 0004-6337
Koch, Andreas and Rich, R. Michael and Reitzel, David B. and Martin, Nicolas F. and Ibata, Rodrigo A. and Chapman, Scott C. and Majewski, Steven R. and Mori, Masao and Loh, Yeong-Shang and Ostheimer, James C. and Tanaka, Mikito (2008) Kinematic and chemical constraints on the formation of M31's inner and outer halo. The Astrophysical Journal, 689 (2). pp. 958-982. ISSN 0004-637X
Howard, Christian D. and Rich, R. Michael and Reitzel, David B. and Koch, Andreas and Propris, Roberto de and Zhao, HongSheng (2008) The Bulge Radial Velocity Assay (BRAVA) : I. Sample selection and a rotation curve. The Astrophysical Journal, 688 (2). pp. 1060-1077. ISSN 0004-637X
Chapman, S. C. and Ibata, Rodrigo A. and Irwin, M. and Koch, Andreas and Letarte, B. and Martin, N. and Collins, M. and Lewis, G. F. and McConnachie, A. and Peñarrubia, J. and Rich, R. Michael and Trethewey, D. and Ferguson, A. and Huxor, A. and Tanvir, Nial (2008) The kinematic footprints of five stellar streams in Andromeda's halo. Monthly Notices of the Royal Astronomical Society, 390 (4). pp. 1437-1452. ISSN 0035-8711
Koch, Andreas and McWilliam, Andrew and Grebel, Eva K. and Zucker, D. B. and Belokurov, V. (2008) The highly unusual chemical composition of the Hercules dwarf spheroidal galaxy. Astrophysical Journal Letters, 688 (1). L13-L16. ISSN 2041-8205
Brown, Thomas M. and Beaton, Rachael and Chiba, Masashi and Ferguson, Henry C. and Gilbert, Karoline M. and Guhathakurta, Puragra and Iye, Masanori and Kalirai, Jasonjot S. and Koch, Andreas and Komiyama, Yutaka and Majewski, Steven R. and Reitzel, David B. and Renzini, A. and Rich, R. Michael and Smith, Ed and Sweigart, Allen V. and Tanaka, Mikito (2008) The extended star formation history of the Andromeda spheroid at 35 kpc on the minor axis. Astrophysical Journal Letters, 685 (2). L121-L124. ISSN 2041-8205
Glatt, Katharina and Grebel, Eva K. and Sabbi, Elena and Gallagher III, John S. and Nota, Antonella and Sirianni, Marco and Clementini, Gisella and Tosi, Monica and Harbeck, Daniel and Koch, Andreas and Kayser, Andrea and Costa, Gary Da (2008) Age determination of six intermediate-age small magellanic cloud star clusters with HST/ACS. The Astronomical Journal, 136 (4). pp. 1703-1727. ISSN 0004-6256
Koch, Andreas and Grebel, Eva K. and Gilmore, G. F. and Wyse, Rosemary F. G. and Kleyna, Jan and Harbeck, Daniel and Wilkinson, Mark I. and Wyn Evans, N. (2008) Complexity on small scales III : iron and α element abundances in the Carina dwarf spheroidal galaxy. The Astronomical Journal, 135 (4). pp. 1580-1597. ISSN 0004-6256
Koch, Andreas and McWilliam, Andrew (2008) A new abundance scale for the globular cluster 47 Tuc. The Astronomical Journal, 135 (4). pp. 1551-1566. ISSN 0004-6256
Glatt, Katharina and Gallagher III, John S. and Grebel, Eva K. and Nota, Antonella and Sabbi, Elena and Sirianni, Marco and Clementini, Gisella and Tosi, Monica and Harbeck, Daniel and Koch, Andreas and Cracraft, Misty (2008) An accurate age determination for the small magellanic cloud star cluster NGC 121 with the Hubble Space Telescope / advanced camera for surveys. The Astronomical Journal, 135 (4). pp. 1106-1116. ISSN 0004-6256
Glatt, K. and Gallagher III, John S. and Grebel, E. K. and Nota, Antonella and Sabbi, Elena and Sirianni, Marco and Clementini, G. and Tosi, M. and Harbeck, Daniel and Koch, Andreas (2008) Ages, distances, and fiducials for seven SMC star clusters with HST/ACS. Bulletin of the American Astronomical Society, 39. p. 836. ISSN 0002-7537
Reitzel, D. B. and Koch, Andreas and Rich, R. M. (2008) Kinematic and chemical constraints on the formation of M31’s inner halo structures. Bulletin of the American Astronomical Society, 39. p. 897. ISSN 0002-7537
Koch, Andreas and McWilliam, A. and Wilkinson, M. I. (2008) The first chemical abundance study of the Hercules dwarf spheroidal galaxy. Bulletin of the American Astronomical Society, 39. p. 896. ISSN 0002-7537
Coleman, Matthew G. and Jordi, Katrin and Rix, Hans-Walter and Grebel, Eva K. and Koch, Andreas (2007) A wide-field view of Leo II : a structural analysis using the Sloan Digital Sky Survey. The Astronomical Journal, 134 (5). pp. 1938-1951. ISSN 0004-6256
Gilmore, Gerard and Wilkinson, Mark I. and Wyse, Rosemary F. G. and Kleyna, Jan and Koch, Andreas and Wyn Evans, N. and Grebel, Eva K. (2007) The observed properties of dark matter on small spatial scales. The Astrophysical Journal, 663 (2). pp. 948-959. ISSN 0004-637X
Koch, Andreas and Kleyna, Jan and Wilkinson, Mark I. and Grebel, Eva K. and Gilmore, G. F. and Wyn Evans, N. and Wyse, Rosemary F. G. and Harbeck, Daniel (2007) Stellar kinematics in the remote Leo II dwarf spheroidal galaxy : another brick in the wall. The Astronomical Journal, 134 (2). pp. 566-578. ISSN 0004-6256
Koch, Andreas and Wilkinson, Mark I. and Kleyna, Jan and Gilmore, Gerard and Grebel, Eva K. and Mackey, A. Dougal and Wyn Evans, N. and Wyse, Rosemary F. G. (2007) Stellar kinematics and metallicities in the Leo I dwarf spheroidal galaxy : wide-field implications for galactic evolution. The Astrophysical Journal, 657 (1). pp. 241-261. ISSN 0004-637X
Koch, Andreas and Grebel, Eva K. and Kleyna, Jan and Wilkinson, Mark I. and Harbeck, Daniel and Gilmore, Gerard and Wyse, Rosemary F. G. and Wyn Evans, N. (2007) Complexity on small scales : II. Metallicities and ages in the Leo II dwarf spheroidal galaxy. The Astronomical Journal, 133 (1). pp. 270-283. ISSN 0004-6256
Koch, Andreas and Grebel, E. K. and McWilliam, A. and Wyse, Rosemary F. G. and Gilmore, G. F. (2007) Chemical abundances in the Carina dwarf spheroidal galaxy. Astronomical Notes / Astronomische Nachrichten, 328 (7): D75. p. 652. ISSN 0004-6337
Rich, R. M. and Brown, Thomas M. and Reitzel, D. B. and Ferguson, H. and Koch, Andreas (2007) Keck/Deimos spectroscopy of distant M31 fields with deep HST imaging. Bulletin of the American Astronomical Society, 38. p. 1155. ISSN 0002-7537
Koch, Andreas and Rich, R. M. and Reitzel, D. B. (2007) Kinematic and chemical constraints on the formation of M31’s inner halo structures. Astronomical Notes / Astronomische Nachrichten, 328 (7): D76. p. 653. ISSN 0004-6337
Gilmore, G. and Wilkinson, M. and Kleyna, Jan and Koch, Andreas and Evans, N. W. and Wyse, Rosemary F. G. and Grebel, E. K. (2007) Observed properties of dark matter : dynamical studies of dSph galaxies. Nuclear Physics B - Proceedings Supplements, 173. pp. 15-18. ISSN 0920-5632
Reitzel, D. B. and Howard, Christian D. and Rich, R. M. and Koch, Andreas and Zhao, HongSheng (2007) The line of sight velocity distribution of the Galactic bulge. Bulletin of the American Astronomical Society, 38. p. 1149. ISSN 0002-7537
Wyse, Rosemary F. G. and Gilmore, Gerard and Norris, John and Wilkinson, Mark I. and Kleyna, Jan and Koch, Andreas and Evans, N. W. and Grebel, E.K. (2006) Further evidence of a merger origin for the thick disk : galactic stars along lines of sight to dwarf spheroidal galaxies. Astrophysical Journal Letters, 639 (1). L13-L16. ISSN 2041-8205
Koch, Andreas and Grebel, Eva K. (2006) The anisotropic distribution of M31 satellite galaxies : a polar great plane of early-type companions. The Astronomical Journal, 131 (3). pp. 1405-1415. ISSN 0004-6256
Koch, Andreas and Grebel, Eva K. and Wyse, Rosemary F. G. and Kleyna, Jan and Wilkinson, Mark I. and Harbeck, Daniel and Gilmore, Gerard and Wyn Evans, N. (2006) Complexity on small scales : the metallicity distribution of the Carina dwarf spheroidal galaxy. The Astronomical Journal, 131 (2). pp. 895-911. ISSN 0004-6256
Wilkinson, M. I. and Kleyna, Jan and Gilmore, G. and Evans, N. W. and Koch, Andreas and Grebel, E. K. and Wyse, Rosemary F. G. and Harbeck, Daniel (2006) Probing the dark matter content of Local Group dwarf spheroidal galaxies with FLAMES. The Messenger (124). pp. 25-29. ISSN 0722-6691
Koch, Andreas and Grebel, E. K. and Wyse, Rosemary F. G. and Kleyna, Jan and Wilkinson, M. I. and Harbeck, Daniel and Gilmore, G. and Evans, N. W. (2006) The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES. The Messenger (123). pp. 38-40. ISSN 0722-6691
Wilkinson, M. I. and Kleyna, Jan and Evans, N. W. and Gilmore, G. and Read, J. I. and Koch, Andreas and Grebel, E. K. and Irwin, M. (2006) The internal kinematics of dwarf spheroidal galaxies. EAS Publications Series, 20. pp. 29-32. ISSN 1633-4760
Harbeck, Daniel and Gallagher III, John S. and Grebel, Eva K. and Koch, Andreas and Zucker, Daniel B. (2005) Andromeda IX : properties of the faintest M31 dwarf satellite galaxy. The Astrophysical Journal, 623 (1). pp. 159-163. ISSN 0004-637X
Wyse, Rosemary F. G. and Gilmore, G. and Norris, John and Wilkinson, M. I. and Kleyna, Jan and Koch, Andreas and Evans, N. W. and Grebel, E. K. (2005) Further evidence for a merger origin for the Thick disk: Galactic stars along line-of-sight to dwarf spheroidal galaxies. Bulletin of the American Astronomical Society, 37. p. 1368. ISSN 0002-7537
Grebel, E. K. and Koch, Andreas and Sambhus, N. (2005) Satellite anisotropies : a polar great plane of M31 early-type companions. Bulletin of the American Astronomical Society, 37. p. 1346. ISSN 0002-7537
Glatt, K. and Grebel, E. K. and Koch, Andreas (2005) Star clusters in the large magellanic cloud. Astronomical Notes / Astronomische Nachrichten, 326 (7). pp. 651-652. ISSN 0004-6337
Koch, Andreas and Wilkinson, M. I. and Kleyna, Jan and Gilmore, G. and Evans, N. W. and Grebel, E. K. (2005) Stellar kinematics in the Leo I dwarf spheroidal galaxy : wide field implications for galactic mass profiles. Bulletin of the American Astronomical Society, 37. p. 1345. ISSN 0002-7537
Wilkinson, M. I. and Kleyna, Jan and Evans, N. W. and Gilmore, G. and Grebel, E. K. and Koch, Andreas and Read, Justin and Young, R. (2005) Substructure in dwarf spheroidals : a star cluster connection? Proceedings of the International Astronomical Union, 1 (C198). pp. 240-243. ISSN 1743-9213
Koch, Andreas and Wilkinson, M. and Grebel, E. K. and Harbeck, Daniel and Kleyna, Jan and Wyse, Rosemary F. G. and Gilmore, G. and Evans, N. W. (2005) The chemical evolution of subpopulations in the Carina dwarf spheroidal. Proceedings of the International Astronomical Union, 1 (C198). pp. 134-138. ISSN 1743-9213
Koch, Andreas and Grebel, Eva K. and Odenkirchen, Michael and Martínez-Delgado, David and Caldwell, John A. R. (2004) Mass segregation in the globular cluster Palomar 5 and its tidal tails. The Astronomical Journal, 128 (5). pp. 2274-2287. ISSN 0004-6256
Koch, Andreas and Grebel, E. K. and Odenkirchen, Michael and Caldwell, John A. R. (2004) Correcting spatial gradients : the case of Wide Field Imager photometry. The Messenger, 115. pp. 37-39. ISSN 0722-6691
Koch, Andreas and Odenkirchen, Michael and Grebel, E. K. and Martinez-Delgado, D. and Caldwell, John A. R. (2004) The luminosity function of Palomar 5 and Its tidal tails. ASP Conference Series, 327. pp. 333-336. ISSN 1050-3390
Koch, Andreas and Grebel, E. K. and Harbeck, Daniel and Wilkinson, M. I. and Kleyna, Jan and Gilmore, G. and Wyse, Rosemary F. G. and Evans, N. W. (2004) The metallicity and age distribution of the Carina dwarf spheroidal galaxy. Astronomical Notes / Astronomische Nachrichten, 325 (S1). p. 44. ISSN 0004-6337
Koch, Andreas and Odenkirchen, Michael and Grebel, E.K. and Caldwell, John A. R. (2003) A calibration map for Wide Field Imager photometry. Astronomical Notes / Astronomische Nachrichten, 325 (4). pp. 299-306. ISSN 0004-6337
Koch, Andreas and Odenkirchen, Michael and Grebel, E. K. and Martinez-Delgado, D. and Caldwell, John A. R. (2003) Mass segregation in the low-concentration globular cluster Palomar 5. Astronomical Notes / Astronomische Nachrichten, 324 (S3). p. 144. ISSN 0004-6337
Koch, Andreas and Odenkirchen, Michael and Caldwell, John A. R. and Grebel, E. K. (2003) A calibration map for the Wide Field Imager. Astronomical Notes / Astronomische Nachrichten, 324 (S2). p. 95. ISSN 0004-6337
Koch, Andreas and Odenkirchen, Michael and Caldwell, John A. R. and Grebel, E. K. (2003) The mass function of the globular cluster Palomar 5 and its tidal tails. Astronomical Notes / Astronomische Nachrichten, 324 (S2). p. 79. ISSN 0004-6337
Koch, Andreas and Grebel, E. K. and Odenkirchen, Michael (2003) A retrospective of r-process and a-element abundances in the Galactic disk : correlations with rotational velocity. Astronomical Notes / Astronomische Nachrichten, 324 (S3). pp. 144-145. ISSN 0004-6337
Koch, Andreas and Edvardsson, Bo (2002) Europium abundances in F and G disk dwarfs. Astronomy and Astrophysics, 381 (2). pp. 500-506. ISSN 1432-0746
Contribution in Book/Report/Proceedings
Koch, Andreas (2009) Complexity in small-scale dwarf spheroidal galaxies : Ludwig Biermann Award Lecture. In: Reviews in Modern Astronomy : Formation and Evolution of Cosmic Structures. Wiley, pp. 39-69. ISBN 9783527409105
Lianou, S. and Grebel, E. K. and Koch, Andreas (2009) Early-type dwarf galaxies in the M81 group. In: Stellar Populations : Planning for the Next Decade. Proceedings of the International Astronomical Union . Cambridge University Press, pp. 115-118.
Glatt, K. and Grebel, E. K. and Koch, Andreas (2009) Young star clusters in the SMC. In: Globular Clusters : Guides to Galaxies. Eso Astrophysics Symposia . Springer, pp. 119-120. ISBN 9783540769606
Kayser, Andrea and Grebel, E. K. and Harbeck, Daniel and Cole, Andrew A. and Koch, Andreas and Gallagher III, John S. and Da Costa, G. (2009) The age-metallicity relation of the SMC. In: Globular Clusters : Guides to Galaxies. Eso Astrophysics Symposia . Springer, pp. 157-160. ISBN 9783540769606
Gilmore, G. and Zucker, D. B. and Wilkinson, M. and Wyse, Rosemary F. G. and Belokurov, V. and Kleyna, Jan and Koch, Andreas and Evans, N. W. and Grebel, E. K. (2008) What Is a galaxy? How cold Is cold dark matter? : Recent progress in near field cosmology. In: Panoramic Views of Galaxy Formation and Evolution :. ASP Conference Series . UNSPECIFIED, pp. 453-456. ISBN 9781583816684
Kayser, Andrea and Grebel, E. K. and Harbeck, Daniel and Cole, Andrew A. and Koch, Andreas and Glatt, Katharina and Gallagher III, John S. and Da Costa, G. (2007) A spectroscopy-based age-metallicity relation of the SMC. In: Stellar Populations as Building Blocks of Galaxies :. Proceedings of the International Astronomical Union, 2 . Cambridge University Press, pp. 351-352.
Koch, Andreas and Grebel, E. K. and Harbeck, Daniel and Wilkinson, M. I. and Kleyna, Jan and Gilmore, G. and Wyse, Rosemary F. G. and Evans, N. W. (2005) Chemical evolution in the Carina dwarf spheroidal. In: Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites :. ESO Astrophysics Symposia . Springer, pp. 249-251. ISBN 9783540341352
Koch, Andreas and Grebel, E. K. (2004) R-process and α-elements in the Galactic disk : kinematic correlations. In: Planets to Cosmology : Essential Science In Hubble’s Final Years. Space Telescope Science Institute Symposium Series . Cambridge University Press. ISBN 9780511166617
Contribution to Conference
Hyde, E. A. and Zucker, D. B. and Irwin, M. and Penarrubia, J. and Koch, Andreas (2011) Hermes and the Sagittarius dwarf : a low metallicity goldmine? In: The 3rd Subaru International Conference, 2011-11-01 - 2011-11-04, Laforet Shuzenji.
Crnojevic, D. and Grebel, E.K. and Ferguson, Annette M. N. and Cole, A. A. and Koch, Andreas and Rejkuba, M. and Da Costa, G. and Jerjen, H. (2011) How unique is the Local Group? : A comparison to the nearby Centaurus A group. In: The 3rd Subaru International Conference, 2011-11-01 - 2011-11-04, Laforet Shuzenji.
Howard, Christian D. and Reitzel, D. B. and Rich, R. M. and Koch, Andreas and Zhao, HongSheng (2007) The Bulge Radial Velocity Assay [BRAVA] : techniques and results. In: The Milky Way Halo, 2007-05-29 - 2007-06-02, AlfA.
Koch, Andreas and McWilliam, A. and Grebel, E. K. and Wyse, Rosemary F. G. and Gilmore, G. F. (2007) Chemical abundances in the Carina dwarf spheroidal galaxy. In: The Milky Way Halo, 2007-05-29 - 2007-06-02, AlfA.
Koch, Andreas and Rich, R. M. and Reitzel, D. B. (2007) Kinematic and chemical constraints on the formation of M31’s inner halo structures. In: The Milky Way Halo, 2007-05-29 - 2007-06-02, AlfA.
Koch, Andreas and Wilkinson, M. I. and Kleyna, Jan and Gilmore, G. F. and Grebel, E. K. and Evans, N. W. and Wyse, Rosemary F. G. (2007) Stellar kinematics in the remote Leo I and II dwarf spheroidals. In: The Milky Way Halo, 2007-05-29 - 2007-06-02, AlfA.
Thesis
Koch, Andreas (2014) Formation histories of galactic halos via chemical and dynamical analyses of near-by stellar systems : Habilitation Thesis. PhD thesis, University of Heidelberg.
Koch, Andreas (2006) Chemical and kinematical evolution in nearby dwarf spheroidal galaxies. PhD thesis, University of Basel.
Koch, Andreas (2003) The luminosity function of the globular cluster Palomar 5 and its tidal tails. Masters thesis, University of Heidelberg.