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The Asymmetric Drift of the Thick Disk Population

Published online by Cambridge University Press:  07 August 2017

Devendra Ojha ,
Annie C. Robin  and
Olivier Bienaymé
Devendra Ojha
Affiliation:
Observatoire de Besançon, BP 1615, F-25010 Besançon, France
Annie C. Robin
Affiliation:
Observatoire de Besançon, BP 1615, F-25010 Besançon, France
Olivier Bienaymé
Affiliation:
Observatoire de Besançon, BP 1615, F-25010 Besançon, France

Extract

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We investigate the kinematics of the thick disk population using photometric and astrometric sample surveys towards two opposite directions at intermediate latitude. A multivariate discriminant analysis (MDA) is used to distinguish the ‘Thick Disk’ from other populations with the help of the Besançon model of population synthesis. The data constrain the asymmetric drift of the thick disk population, which is found to be 40±10 km/s and does not depend on the galactic radius.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 164: Stellar Populations , 1995 , pp. 384
Copyright
Copyright © Kluwer 1995 

References

Ojha, D.K., Bienaymé, O., Robin, A.C., Mohan, V., 1994a, A&A 284, 810 Google Scholar
Ojha, D.K., Bienaymé, O., Robin, A.C., Mohan, V., 1994b, A&A 290, 771 Google Scholar