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Article overview
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Exploring the Local Milky Way: M Dwarfs as Tracers of Galactic Populations | | John J. Bochanski
; Jeffrey A. Munn
; Suzanne L. Hawley
; Andrew A. West
; Kevin R. Covey
; Donald P. Schneider
; | | Date: |
1 Aug 2007 | | Abstract: | We have assembled a spectroscopic sample of low-mass dwarfs observed as part
of the Sloan Digital Sky Survey along one Galactic sightline, designed to
investigate the observable properties of the thin and thick disks. This sample
of ~7400 K and M stars also has measured ugriz photometry, proper motions, and
radial velocities. We have computed UVW space motion distributions, and
investigate their structure with respect to vertical distance from the Galactic
Plane. We place constraints on the velocity dispersions of the thin and thick
disks, using two-component Gaussian fits. We also compare these kinematic
distributions to a leading Galactic model. Finally, we investigate other
possible observable differences between the thin and thick disks, such as
color, active fraction and metallicity. | | Source: | arXiv, 0708.0044 | | Services: | Forum | Review | PDF | Favorites | |
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