Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8615b&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #86.15; Bulletin of the American Astronomical Society, V
Other
Scientific paper
The Milky Way and its environment provide a unique, powerful laboratory for testing theories of galaxy formation and small-scale predictions of CDM cosmology. Recent results from large-area surveys have drastically altered our view of the Galaxy and made it clear that it is a complex, dynamical structure that is still being shaped by the infall of smaller systems. The multicolor, multi-epoch photometric map created by the LSST will provide an unprecedented means to explore the Galaxy's structure, star formation, chemical enrichment, and accretion history on a panoramic scale. Strategic time and space sampling of each field over ten years will allow variability, proper motion and parallax measurements for objects brighter than V 24, and the final map will cover half the sky to V 26.5. This combination of area, depth and time resolution will enable Galactic science from the solar neighborhood to the edge of the Milky Way's halo and well into the Local Group. RR Lyrae stars detected in the time-series data will reach to 400 kpc, tracing the halo structure and substructure beyond the Milky Way's virial radius. Parallax measurements will create a census of all stars within 500pc down to the hydrogen-burning limit. Accurate multi-band colors will permit both photometric parallaxes and chemical abundance estimates for over a billion main sequence stars to 100 kpc. Proper motions and 3D structural maps will provide a powerful statistical sample for Galactic studies. The LSST photometry will reach M(V) +8 in the Magellanic Clouds, allowing their main sequence stars to be used for tracing the detailed interaction of the Clouds with the Galaxy halo. New dwarf galaxies in the Local Group and other nearby groups will be revealed via over-densities in resolved stars. Novae discovered by LSST time sampling will trace intergalactic stars out to the Virgo and Fornax clusters.
Bullock James
Ivezic Zeljko
LSST Milky Way Science Collaboration
Rockosi Constance M.
Saha Avishek
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