The Bulge Radial Velocity Assay (BRAVA):II. Complete sample and data release

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). ISSN 0004-6256

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We present new radial velocity measurements from the Bulge Radial Velocity Assay, a large-scale spectroscopic survey of M-type giants in the Galactic bulge/bar region. The sample of ~4500 new radial velocities, mostly in the region –10° < l < +10° and b ≈ –6°, more than doubles the existent published data set. Our new data extend our rotation curve and velocity dispersion profile to +20°, which is ~2.8 kpc from the Galactic center. The new data confirm the cylindrical rotation observed at –6° and –8° and are an excellent fit to the Shen et al. N-body bar model. We measure the strength of the TiOε molecular band as a first step toward a metallicity ranking of the stellar sample, from which we confirm the presence of a vertical abundance gradient. Our survey finds no strong evidence of previously unknown kinematic streams. We also publish our complete catalog of radial velocities, photometry, TiO band strengths, and spectra, which is available at the Infrared Science Archive as well as at UCLA.

Item Type:
Journal Article
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The Astronomical Journal
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accepted to the Astronomical Journal
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01 Dec 2016 12:46
Last Modified:
22 Sep 2023 00:30