Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1273..141v&link_type=abstract
17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 141-145 (2010).
Astronomy and Astrophysics
Astronomy
White Dwarfs, Galaxies, Photometry, Brightness, Astrometry, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Galactic Halo, Photometric, Polarimetric, And Spectroscopic Instrumentation, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Astrometry And Reference Systems
Scientific paper
We report on ancient white dwarfs found in the proper motion survey we are conducting at the Bok and USNO telescopes. To date we have surveyed approximately 2800 square degrees of sky and identified numerous WDs with Teff <=6000. A subset of these WDs are high velocity objects that most likely belong to the Galactic halo population. Where possible, we are acquiring trigonometric parallaxes to constrain the WD masses. We apply a new Bayesian modeling approach to these WDs that consistently incorporates precursor evolutionary timescales, the initial-final mass relation, WD interior and atmosphere models, and uses the observed magnitudes, distances, etc. to derive the distribution of WD age as a function of uncertainties in the observational parameters.
Degennaro Steven
Harris Hugh
Hippel Ted von
Jeffery Elizabeth
Jefferys Bill
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