The shape and rotation of stellar tracers in the Milky Way bulge

Details The shape and rotation of stellar tracers in the Milky Way bulge The shape and rotation of stellar tracers in the Milky Way bulge

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.5403z&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #54.03; Bulletin of the American Astronomical Society, Vol. 25, p.892

Astronomy and Astrophysics

Astronomy

Scientific paper

We use proper motion data as well as the light distribution as a probe to study the rotation of the bulge. The bulge stellar populations and metallicity groups are modelled as barotropic tracers in a triaxial potential computed from a modified Kent mass model. We find that tracers with increasing rotation have increasing proper motion anisotropy and decreasing dispersion; they are increasingly both flattened and concentrated to the center. Flattening and proper motion anisotropy also increase with radii. We identify the low dispersion and highly concentrated component as the metal rich or young population of the bulge.

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