Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21712203w&link_type=abstract
American Astronomical Society, AAS Meeting #217, #122.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
LSST will yield revolutionary, multi-dimensional maps of the Milky Way (MW) galaxy and its neighbors. Over its 10-year survey period, LSST will catalog 10 billion MW stars (including photometric metallicities for 200 million F/G stars within 100 kpc) and map their tangential velocity field to at least 10 kpc (at 10 km/s precision) and as far as 25 kpc (at 60 km/s precision). Parallax data will allow a complete census of stars above the hydrogen-burning limit that are closer than 500 pc, and RR Lyrae stars will be detectable through their variability to a distance limit of 400 kpc. The star formation and hierarchical merging history of the MW to be facilitated by these deep maps will complement LSST's observational cosmology based on billions of distant galaxies. The census of MW dwarf galaxy satellites and remnants will be complete out to the virial radius within LSST's footprint, and will provide a detailed window into the spatial distribution and abundance of dark matter halos on sub-galactic scales. In this talk, I will highlight a few specific Galactic science programs and the corresponding simulations and observations we are conducting to prepare for LSST operations.
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