NOAO >   Observing Info >   Approved Programs >   2017A-0351

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Program Information for 2017A-0351


PI: Jay Holberg, U. of Arizona, holberg@lpl.arizona.edu
Address: LPL, 1541 E. University Blvd, Tucson, AZ 85721 USA

CoI: Terry Oswalt, Embry-Riddle Aeronautical U.
CoI: Pierre Bergeron, Université of Montréal
CoI: Enrique Garcia-Berro, Universitat Politècnica de Catalunya
CoI: Sebastien Lepine, Georgia State U.
CoI: Alberto Rebassa, Universitat Politècnica de Catalunya

Title: A Complete Volume-Limited 50 pc Sample of White Dwarfs

Abstract: We plan to construct a virtually complete, volume-limited sample of all white dwarfs stars within 50 pc of the sun. We have previously studied local samples encompassing 20 pc and 25 pc, which contained only a few hundred stars. The new 50 pc sample will be based on the planned Nov. 2017 Gaia data release of highly accurate parallaxes, and is expected to contain ~2400 white dwarfs. As with our smaller samples these stars will require spectroscopic observations to determine spectral type, temperatures, gravities, masses and ages. The sample proposed here includes stars for which we currently have good reason to believe are within 50 pc, but lack spectroscopy. We already possess observations of approximately 1000 stars in the 50 pc sample and wish to complete observations of the currently known stars in advance of the Gaia data release.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017A):  KP-4m/KOSMOS -- 2n on Jul 01 - Jul 02 2017
Run 2 (2017A):  SOAR/Goodman -- 4n on Mar 17 - Mar 18 2017, Jul 28 - Jul 29 2017


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017A-0351

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