The first post-Kepler brightness dips of KIC 8462852

Boyajian, Tabetha. S. and Alonso, Roi and Ammerman, Alex and Armstrong, David and Ramos, A. Asensio and Barkaoui, K. and Beatty, Thomas G. and Benkhaldoun, Z. and Benni, Paul and O. Bentley, Rory and Berdyugin, Andrei and Berdyugina, Svetlana and Bergeron, Serge and Bieryla, Allyson and Blain, Michaela G. and Blanco, Alicia Capetillo and Bodman, Eva H. L. and Boucher, Anne and Bradley, Mark and Brincat, Stephen M. and Brink, Thomas G. and Briol, John and Brown, David J. A. and Budaj, J. and Burdanov, A. and Cale, B. and Carbo, Miguel Aznar and García, R. Castillo and Clark, Wendy J and Clayton, Geoffrey C. and Clem, James L. and Coker, Phillip H and Cook, Evan M. and Copperwheat, Chris M. and Curtis, J. L. and Cutri, R. M. and Cseh, B. and Cynamon, C. H. and Daniels, Alex J. and Davenport, James R. A. and Deeg, Hans J. and Lorenzo, Roberto De and Jaeger, Thomas De and Desrosiers, Jean-bruno and Dolan, John and Dowhos, D. J. and Dubois, Franky and Durkee, R. and Dvorak, Shawn and Easley, Lynn and Edwards, N. and Ellis, Tyler G. and Erdelyi, Emery and Ertel, Steve and Farfán, Rafael. G. and Farihi, J. and Filippenko, Alexei V. and Foxell, Emma and Gandolfi, Davide and Garcia, Faustino and Giddens, F. and Gillon, M. and González-carballo, Juan-luis and González-fernández, C. and Hernández, J. I. González and Graham, Keith A. and Greene, Kenton A. and Gregorio, J. and Hallakoun, Na’ama and Hanyecz, Ottó and Harp, G. R. and Henry, Gregory W. and Herrero, E. and Hildbold, Caleb F. and Hinzel, D. and Holgado, G. and Ignácz, Bernadett and Ilyin, Ilya and Ivanov, Valentin D. and Jehin, E. and Jermak, Helen E. and Johnston, Steve and Kafka, S. and Kalup, Csilla and Kardasis, Emmanuel and Kaspi, Shai and Kennedy, Grant M. and Kiefer, F. and Kielty, C. L. and Kessler, Dennis and Kiiskinen, H. and Killestein, T. L. and King, Ronald A. and Kollar, V. and Korhonen, H. and Kotnik, C. and Könyves-tóth, Réka and Kriskovics, Levente and Krumm, Nathan and Krushinsky, Vadim and Kundra, E. and Lachapelle, Francois-rene and Lacourse, D. and Lake, P. and Lam, Kristine and Lamb, Gavin P. and Lane, Dave and Lau, Marie Wingyee and Lewin, Pablo and Lintott, Chris and Lisse, Carey and Logie, Ludwig and Longeard, Nicolas and Villanueva, M. Lopez and Ludington, E. Whit and Mainzer, A. and Malo, Lison and Maloney, Chris and Mann, A. and Mantero, A. and Marengo, Massimo and Marchant, Jon and Martínez González, M. J. and Masiero, Joseph R. and Mauerhan, Jon C. and Mccormac, James and Mcneely, Aaron and Meng, Huan Y. A. and Miller, Mike and Molnar, Lawrence A. and Morales, J. C. and Morris, Brett M. and Muterspaugh, Matthew W. and Nespral, David and Nugent, C. R. and Nugent, Katherine M. and Odasso, A. and O’keeffe, Derek and Oksanen, A. and O’meara, John M. and Ordasi, András and Osborn, Hugh and Ott, John J. and Parks, J. R. and Perez, Diego Rodriguez and Petriew, Vance and Pickard, R and Pál, András and Plavchan, P. and Pollacco, Don and Nuñez, F. Pozo and J. Pozuelos, F. and Rau, Steve and Redfield, Seth and Relles, Howard and Ribas, Ignasi and Richards, Jon and Saario, Joonas L. O. and Safron, Emily J. and Sallai, J. Martin and Sárneczky, Krisztián and Schaefer, Bradley E. and Schumer, Clea F. and Schwartzendruber, Madison and Siegel, Michael H. and Siemion, Andrew P. V. and Simmons, Brooke D. and Simon, Joshua D. and Simón-díaz, S. and Sitko, Michael L. and Socas-navarro, Hector and Sódor, Á. and Starkey, Donn and Steele, Iain A. and Stone, Geoff and Strassmeier, Klaus G. and Street, R. A. and Sullivan, Tricia and Suomela, J. and Swift, J. J. and Szabó, Gyula M. and Szabó, Róbert and Szakáts, Róbert and Szalai, Tamás and Tanner, Angelle M. and Toledo-padrón, B. and Tordai, Tamás and Triaud, Amaury H. M. J. and Turner, Jake D. and Ulowetz, Joseph H. and Urbanik, Marian and Vanaverbeke, Siegfried and Vanderburg, Andrew and Vida, Krisztián and Vietje, Brad P. and Vinkó, József and Braun, K. Von and Waagen, Elizabeth O. and Walsh, Dan and Watson, Christopher A. and Weir, R. C. and Wenzel, Klaus and Plaza, C. Westendorp and Williamson, Michael W. and Wright, Jason T. and Wyatt, M. C. and Zheng, Weikang and Zsidi, Gabriella (2018) The first post-Kepler brightness dips of KIC 8462852. Astrophysical Journal Letters, 853 (1): L8. ISSN 2041-8205

[thumbnail of 1801.00732]
PDF (1801.00732)
1801.00732.pdf - Accepted Version
Available under License Creative Commons Attribution.

Download (1MB)


We present a photometric detection of the first brightness dips of the unique variable star KIC 8462852 since the end of the Kepler space mission in 2013 May. Our regular photometric surveillance started in 2015 October, and a sequence of dipping began in 2017 May continuing on through the end of 2017, when the star was no longer visible from Earth. We distinguish four main 1%–2.5% dips, named "Elsie," "Celeste," "Skara Brae," and "Angkor," which persist on timescales from several days to weeks. Our main results so far are as follows: (i) there are no apparent changes of the stellar spectrum or polarization during the dips and (ii) the multiband photometry of the dips shows differential reddening favoring non-gray extinction. Therefore, our data are inconsistent with dip models that invoke optically thick material, but rather they are in-line with predictions for an occulter consisting primarily of ordinary dust, where much of the material must be optically thin with a size scale Lt1 μm, and may also be consistent with models invoking variations intrinsic to the stellar photosphere. Notably, our data do not place constraints on the color of the longer-term "secular" dimming, which may be caused by independent processes, or probe different regimes of a single process.

Item Type:
Journal Article
Journal or Publication Title:
Astrophysical Journal Letters
Uncontrolled Keywords:
?? space and planetary scienceastronomy and astrophysics ??
ID Code:
Deposited By:
Deposited On:
21 Sep 2018 15:38
Last Modified:
16 Apr 2024 01:05