A complete census of Galactic white dwarfs to 40 parsecs of the Sun.

Details A complete census of Galactic white dwarfs to 40 parsecs of the Sun. A complete census of Galactic white dwarfs to 40 parsecs of the Sun.

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..341l&link_type=abstract

NOAO Proposal ID #2009B-0341

Computer Science

Scientific paper

We propose to obtain spectra for 306 new white dwarfs suspected to be within 40 parsecs of the Sun. Spectral analysis will confirm the white dwarf status and provide estimates of atmospheric parameters and reliable distance for all objects. This survey will significantly expand the census of nearby white dwarfs, which is currently complete only to about 20 parsecs of the Sun, a volume which includes only a little over 120 white dwarfs. Our new survey will provide a statistically complete census of white dwarfs to a significantly larger distance. In contrast to past surveys of nearby white dwarfs which suffer from significant kinematic bias due to proper motion selection, our new census will be relatively free of kinematic bias due to a much smaller proper motion limit used in the target selection. The census will thus more efficiently probe the local population of white dwarfs in the Galactic disk.

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