Results From The Brava Survey: Kinematics At The Edge Of The Galactic Bulge

Details Results From The Brava Survey: Kinematics At The Edge Of The Galactic Bulge Results From The Brava Survey: Kinematics At The Edge Of The Galactic Bulge

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341607h&link_type=abstract

American Astronomical Society, AAS Meeting #213, #416.07; Bulletin of the American Astronomical Society, Vol. 41, p.227

Astronomy and Astrophysics

Astronomy

Scientific paper

We report an analysis of dynamics for fields at the edge of the Galactic bulge at latitudes $b=-4\deg$ and $b=-8\deg$. The line of sight velocity distribution is Gaussian, and there is no evidence for a sub population with cold dynamics (a disk) or hot dyanmics (a spheroid). A shifted, coadded Gaussian for stars in the -8 deg band also gives a dispersion of 74 km/s, with no evidence of non-Gaussian omponents. We present the l-v plot for the -4 and -8 degree fields; individual line of sight distributions in the -8 deg band show now evidence of cold streams. We also present spectra of stars with the most extreme velocity from the BRAVA survey.

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