The Bulge Radial Velocity Assay: Extension toward the Plane and the Inner Halo

Details The Bulge Radial Velocity Assay: Extension toward the Plane and the Inner Halo The Bulge Radial Velocity Assay: Extension toward the Plane and the Inner Halo

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..507r&link_type=abstract

NOAO Proposal ID #2009B-0507

Computer Science

Scientific paper

We propose to continue our radial velocity survey of M giant stars in the Galactic bulge, inner disk, and inner halo. The overall aim of the project is describe the kinematics of the bulge, and its abundance dependence, and to compare with dynamical models, elucidating the formation history and dynamical state of the bulge. Our aim in 2009B is to push our survey toward the plane and to complete the strip at b=- 2°, and to extend our probe of the bulge/disk/halo boundaries, with fields at b=-10° and fields extending at l>12°. The b=- 2° strip is intended to probe the mass distribution and orbit structure of the inner bulge. The band at b=-10 ° is aimed to find the point where cylindrical rotation breaks down, and to probe the region where the bulge metallicity and velocity dispersion is dropping, suggesting that we are reaching the bulge/halo boundary. The full dataset is in active use by 2 theoretical groups, being compared with N- body and self-consistent bar models.

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