Dissecting the Milky Way with SDSS

Details Dissecting the Milky Way with SDSS Dissecting the Milky Way with SDSS

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.2106b&link_type=abstract

American Astronomical Society Meeting 205, #21.06; Bulletin of the American Astronomical Society, Vol. 36, p.1377

Astronomy and Astrophysics

Astronomy

Scientific paper

Using the photometric parallax method, we estimate the distances to 47 million stars detected by the SDSS, and map their three-dimensional number density distribution in the Galaxy. The currently available data sample a distance range from 100 pc to 15 kpc, and cover 6,000 deg2 of sky. The derived stellar number density maps allow us to study Galactic structure without any a priori assumptions about its components. Yet, the data strongly favor a three-component Galaxy consisting of a halo, and thin and thick disks, with parameters similar to previous work. While roughly consistent with the standard model, we find that the measured density distribution shows a number of statistically significant deviations from it.

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