Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - The Bulge Radial Velocity Assay (BRAVA)
T2 - II. Complete sample and data release
AU - Kunder, Andrea
AU - Koch, Andreas
AU - Rich, R. Michael
AU - Propris, Roberto de
AU - Howard, Christian D.
AU - Stubbs, Scott A.
AU - Johnson, Christian I.
AU - Shen, Juntai
AU - Wang, Yougang
AU - Robin, Annie C.
AU - Kormendy, John
AU - Soto, Mario
AU - Frinchaboy, Peter
AU - Reitzel, David B.
AU - Zhao, HongSheng
AU - Origlia, Livia
N1 - accepted to the Astronomical Journal
PY - 2012/2/6
Y1 - 2012/2/6
N2 - 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.
AB - 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.
KW - astro-ph.SR
U2 - 10.1088/0004-6256/143/3/57
DO - 10.1088/0004-6256/143/3/57
M3 - Journal article
VL - 143
JO - The Astronomical Journal
JF - The Astronomical Journal
SN - 0004-6256
IS - 3
M1 - 57
ER -