The Bulge Radial Velocity Assay: The Bulge/Disk/Halo Boundaries

Details The Bulge Radial Velocity Assay: The Bulge/Disk/Halo Boundaries The Bulge Radial Velocity Assay: The Bulge/Disk/Halo Boundaries

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..451r&link_type=abstract

NOAO Proposal ID #2008B-0451

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 emphasis in 2008B is to map the velocity distribution at the bulge/halo and bulge/disk boundaries, and to measure the rotation curve at b=+8°, to confirm our tentative finding of cylindrical, solid body rotation at b=-8°. The line of sight radial velocity distribution is to be compared with theoretical models of the bulge, and the velocity field will help to define and distinguish the stellar populations of the inner Galaxy. The survey will also uncover any cold velocity structures that may have arisen from the infall of satellites or from unusual orbit families in the bar. The spectra will yield abundances via the Ca triplet method, and these will be used to explore kinematics as a function of abundance in the bulge.

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