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Constraints on the Galactic bar with RAVE

Published online by Cambridge University Press:  06 January 2014

T. Antoja ,
A. Helmi  and
the RAVE collaboration
T. Antoja
Affiliation:
Kapteyn Astronomical Institute, University of Groningen email: antoja@astro.rug.nl
A. Helmi
Affiliation:
Kapteyn Astronomical Institute, University of Groningen email: antoja@astro.rug.nl
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Abstract

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We derive the pattern speed of the Galactic bar from the analysis of the kinematics of the Hercules stream at different Galactocentric radii with RAVE, assuming that Hercules is caused by the bar. We find a well constrained pattern speed of Ωb=1.98+0.04−0.08 Ωo, where Ω0 is the local circular frequency.

Keywords

Galaxy: diskevolutionkinematics and dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S298: Setting the scene for Gaia and LAMOST , May 2013 , pp. 395
Copyright
Copyright © International Astronomical Union 2014 

References

Antoja, T., Helmi, A., Bienayme, O., et al. 2012, MNRAS, 426, L1CrossRefGoogle Scholar
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Steinmetz, M., Zwitter, T., Siebert, A., et al. 2006, AJ, 132, 1645Google Scholar