Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21532106r&link_type=abstract
American Astronomical Society, AAS Meeting #215, #321.06; Bulletin of the American Astronomical Society, Vol. 42, p.323
Astronomy and Astrophysics
Astronomy
Scientific paper
The Bulge Radial Velocity Assay has surveyed radial velocities for Galactic bulge M giants at b=-4 deg, b=-8 deg, and a range of fields on the minor axis. We report a striking agreement between a model N-body bar and our radial velocity data, obtained using Hydra at the CTIO 4m telescope. This is the closest agreement ever reported between radial velocity data in the bulge, and a largescale dynamical model. The N-body bar secularly evolves from a massive disk, after experiencing a buckling instability. We use the results to place upper limits on the fraction of the population that might belong to a "classical" bulge population that is not part of the bar. We also report the first analysis of metallicities from the Ca infrared triplet method, for our dataset, and how kinematics and metallicities are correlated.
This research was supported by grant AST-0709479 from the National Science Foundation.
de Propris Roberto
Howard Christian D.
Koch Alan
Reitzel David B.
Rich Robert Michael
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