Dissecting the Milky Way with LSST

Details Dissecting the Milky Way with LSST Dissecting the Milky Way with LSST

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.2608i&link_type=abstract

American Astronomical Society Meeting 207, #26.08; Bulletin of the American Astronomical Society, Vol. 37, p.1203

Astronomy and Astrophysics

Astronomy

Scientific paper

The LSST will produce an accurate multi-color digital map of half the sky down to V ˜ 27.5. Accurate colors will allow the estimate of photometric distance, and hence the three-dimensional number density distribution, for over a billion main-sequence stars, to a distance limit of 100 kpc. We extrapolate a similar study based on SDSS data (V < 21.5) to investigate how LSST will extend the detailed knowledge of our Galaxy. This final deep map will be based on several hundred observations (to V ˜ 24.5) spread over ten years that will enable proper motion measurements accurate to 0.2 mas/yr (corresponding to 10 km/s at 10 kpc) and geometric parallax measurements accurate to 1 mas. Using the same method, we also discuss how these measurements will further enhance our understanding of the Milky Way.

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