The Bulge Radial Velocity Assay: Techniques and a Rotation Curve | Zendy

R. Michael Rich | Zendy; David B. Reitzel | Zendy; Christian Howard | Zendy; Hongsheng Zhao | Zendy

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The Bulge Radial Velocity Assay: Techniques and a Rotation Curve

Author(s) -

R. Michael Rich,

David B. Reitzel,

Christian Howard,

Hongsheng Zhao

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/513509

Subject(s) - bulge , physics , radial velocity , galaxy rotation curve , velocity dispersion , astrophysics , rotation (mathematics) , stars , light curve , stellar kinematics , astronomy , kinematics , milky way , geometry , halo , galaxy , classical mechanics , mathematics

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

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