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3-D kinematics in low foreground extinction windows of the Galactic bulge†

Published online by Cambridge University Press:  01 July 2007

M. Soto ,
K. Kuijken  and
R. M. Rich
M. Soto
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300RA Leiden, The Netherlands email: soto@strw.leidenuniv.nl
K. Kuijken
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300RA Leiden, The Netherlands email: soto@strw.leidenuniv.nl
R. M. Rich
Affiliation:
Dept. of Physics and Astronomy, University of California, Los Angeles CA 90095-1562, U.S.A.
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Abstract

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We report the progress in our measurement of the 3-D kinematics in several low foreground extinction windows of the Galactic Bulge. In order to complete the 3-D kinematics of as many stars as possible, proper motions and radial velocities have been obtained using HST WFPC2-ACS and VLT VIMOS respectively. Our preliminary results for fields close to the galactic minor axis show a significant vertex deviation, which can be directly related to a signature of triaxility. This is one of the strongest proofs to date of the presence of the stellar bar in the galactic bulge.

Keywords

Galaxy: bulgeGalaxy: kinematics and dynamicstechniques: radial velocities
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 347 - 350
Copyright
Copyright © International Astronomical Union 2008

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