AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 84. Studying the Anatomy of the Milky Way
Display, Thursday, June 3, 1999, 9:20am-4:00pm, Southwest Exhibit Hall

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[84.15] Is the Galaxy Symmetric? -- A Comparison of Starcounts of Faint Blue Stars

R. M. Humphreys, J. E. Parker, B. J. Anderson, J. Webster (University of Minnesota), J. A. Larsen (University of Arizona)

Larsen and Humphreys[1996] reported evidence for a significant asymmetry in the number of faint blue stars on either side of the line to the Galactic Center from \ell = ±20\arcdeg to ±45\arcdeg at b = +30\arcdeg with significantly more stars observed in the first quadrant. In this poster we present a more complete survey of faint blue stars on either side of the Sun-Center line from \ell = ± 20\arcdeg to ±75\arcdeg and b = +20\arcdeg to +50\arcdeg and map the extent of the excess. We also discuss possible explanations for the asymmetry. Spectroscopic observations are now in progress to determine the nature and kinematics of the stars responsible.

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