The Bulge Radial Velocity Assay (BRAVA): II. Complete Sample and Data Release

By A. Kunder, A. Koch, R. Rich, R. Propris, C. Howard, Scott Stubbs, Christian I. Johnson, Juntai Shen, Yougang Wang, Annie Robin and 6 more. 2011

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We present new radial velocity measurements from the Bulge Radial Velocity Assay (BRAVA), 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 deg < l < +10 deg and b ~ -6 deg more than doubles the existent published data set. Our new data extend our rotation curve and velocity dispersion profile to +20 deg, which is ~2.8 kpc from the Galactic Center. The new data confirm the cylindrical rotation observed at -6 deg and -8 deg, and are an excellent fit to the Shen et al. (2010) N-body bar model. We measure the strength of the TiO molecular band as a first step towards 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 IRSA archive: this http URL as well as at UCLA: this http URL

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/68c2b12dbb8d6d68c556ed06d8e2418aaffd5553

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Citations in the corpus

Dynamical modelling of the galactic bulge and bar: the Milky Way's pattern speed, stellar and dark matter mass distribution (2016, methodology): “The BRAVA survey is a large spectroscopic survey of about 10000 M giant stars, mostly towards the bulge (Rich et al. 2007; Howard et al. 2008; Kunder et al. 2012).”
The Galaxy in Context: Structural, Kinematic, and Integrated Properties (2016, methodology): “Shen et al. (2010) and Long et al. (2012) find b 40 km s−1 kpc−1 for the same N-body model matched to the BRAVA kinematic data.”
ARGOS – IV. The kinematics of the Milky Way bulge (2013, methodology): “Thse data extend the cylindrical rotation found in the BRAVA survey (Howard et al. 2009; Kunder et al. 2012) to longitudes of|l| = 10◦.”
REDDENING AND EXTINCTION TOWARD THE GALACTIC BULGE FROM OGLE-III: THE INNER MILKY WAY'S RV ∼ 2.5 EXTINCTION CURVE (2012, background): “There is also evidence that the metal-poor stars are distributed as a classical bulge (Babusiaux et al. 2010; De Propris et al. 2011; Uttenthaler et al. 2012), whereas the data on metal-rich M-giants are consistent with entirely cold kinematics (Kunder et al. 2012).”
Galactic Searches for Dark Matter (2012, unknown): “At low Galactic latitudes, the velocity dispersion of the bulge varies from ∼ 130 km/s at ` = 0◦ to ∼ 90 km/s at ` = ±6◦ (Kunder et al., 2012).”
Made-to-measure models of the Galactic box/peanut bulge: stellar and total mass in the bulge region (2015, methodology): “To do so we use the 3D density of RCGs from Wegg & Gerhard (2013, hereafter also WG13) as well as kinematic data from the BRAVA survey (Howard et al. 2008; Kunder et al. 2012) to create particle models using the Made-to-Measure method (M2M).”
Reconstructing the star formation history of the Milky Way disc(s) from chemical abundances (2014, background): “This estimate has been confirmed by Kunder et al. (2012).”