Obs besanconfr 6 components thin disk warped ared

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Unformatted text preview: e n = 2.77 ± 0.2 •  # duse of rPOSS t Solar ensity a8os a astrometry (accurate 0 ⇥150 mas circle: 1 :to .12 : 0.005 after re- calibration) limits proper mo5 thin : thick : halo tion accuracy to 3 mas/yr UW, ASTR 323, SP13, Eric Agol ©2013 Galac8c Bulge/bar Doged: K- band data from DIRBE; Solid/dashed lines: model of bulge/bar Contours represent brightness intervals of 1 magnitude difference Zhao (1996, MNRAS, 283, 149) 4/4/13 UW, ASTR 323, SP13, Eric Agol ©2013 6 Pulng it all together: Besançon model hgp://model.obs- besancon.fr/ •  6 components: thin disk (warped & flared), thick disk, stellar & dark halos, ISM, bulge/bar •  Self- consistently solve for, age/metallicity density & velocity of stars, from observed number counts, veloci8es & metallici8es BVR JHK Robin et al. (2003) 4/4/13 UW, ASTR 323, SP13, Eric Agol ©2013 7 Other Galac8c components: 1.  Spiral arms (Drimmel & Spergel 2001) Sun Dust surface density 4/4/13 K- band (2.2 μm) surface brightness...
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This document was uploaded on 04/05/2014.

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