A New, Deep Proper Motion Survey for Ancient White Dwarfs

Details A New, Deep Proper Motion Survey for Ancient White Dwarfs A New, Deep Proper Motion Survey for Ancient White Dwarfs

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1507v&link_type=abstract

American Astronomical Society, AAS Meeting #211, #15.07; Bulletin of the American Astronomical Society, Vol. 39, p.765

Astronomy and Astrophysics

Astronomy

Scientific paper

We describe our on-going wide-field proper motion survey for ancient white dwarfs (WDs) that we are conducting with the Steward Observatory Bok Telescope and its prime focus imaging camera. To date we have observed over 1000 square degrees in the r-band to r 21. We match this astrometry to the Sloan Digital Sky Survey astrometry and photometry to produce a reduced proper motion diagram, from which we select WDs. We obtain errors in proper motion of 20-30 mas per year at the faint limit of our survey. When the survey is completed, we expect to find 30 WDs in the last magnitude bin of the disk WDLF, 16,000 thick disk WDs, and 750 halo WDs.

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