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• W2038884491 abstract "The Pan-STARRS1 survey has obtained multi-epoch imaging in five bands (Pan-STARRS1 gP1, rP1, iP1, zP1, and yP1) on 12 Medium-Deep fields, each of which spans a 33 circle. For the period between 2009 April and 2011 April these fields were observed 50–200 times. Using a reduced proper motion diagram, we have extracted a list of 47 white dwarf (WD) candidates whose Pan-STARRS1 astrometry indicates a non-zero proper motion at the 6σ level, with a typical 1σ proper motion uncertainty of 10 mas yr−1. We also used astrometry from the Sloan Digital Sky Survey (when available) and USNO-B to assess our proper motion fits. None of the WD candidates exhibits evidence of statistically significant parallaxes, with a typical 1σ uncertainty of 8 mas. Twelve of these candidates are known WDs, including the high proper motion (17 yr−1) WD LHS 291. We confirm seven more objects as WDs through optical spectroscopy. Based on the Pan-STARRS1 colors, ten of the stars are likely to be cool WDs with 4170 K <Teff < 5000 K and cooling ages ≈ 8 Gyr. Based on their kinematics, these objects are likely thick disk WDs, but a subset may belong to the halo. Our current sample represents only a small fraction of the Pan-STARRS1 data. With continued coverage from the Medium-Deep Field Survey and the 3π survey, Pan-STARRS1 should find many more high proper motion WDs that are part of the old thick disk and halo." @default.
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• W2038884491 date "2011-12-28" @default.
• W2038884491 modified "2023-10-03" @default.
• W2038884491 title "FIRST RESULTS FROM Pan-STARRS1: FAINT, HIGH PROPER MOTION WHITE DWARFS IN THE MEDIUM-DEEP FIELDS" @default.
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• W2038884491 doi "https://doi.org/10.1088/0004-637x/745/1/42" @default.
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