The Bulge Radial Velocity Assay (BRAVA): I. Techniques and a Rotation Curve

Details The Bulge Radial Velocity Assay (BRAVA): I. Techniques and a Rotation Curve The Bulge Radial Velocity Assay (BRAVA): I. Techniques and a Rotation Curve

2006-11-13

arxiv.org/abs/astro-ph/0611403v2

Astrophys.J.658:L29-L32,2007

Astronomy and Astrophysics

Astrophysics

Accepted to ApJ letters. This replacement updates the paper to the accepted version

Scientific paper

10.1086/513509

We are undertaking a large scale radial velocity survey of the Galactic bulge which uses M giant stars selected from the 2MASS catalog as targets for the CTIO 4m Hydra multi-object spectrograph. The aim of this survey is to test dynamical models of the bulge and to quantify the importance, if any, of cold stellar streams in the bulge and its vicinity. Here we report on the kinematics of a strip of fields at -10 < l <+10 degres and b=-4 degres. We construct a longitude-velocity plot for the bulge stars and the model data, and find that contrary to previous studies, the bulge does not rotate as a solid body. From -5

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