Mathematics – Probability
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21925006a&link_type=abstract
American Astronomical Society, AAS Meeting #219, #250.06
Mathematics
Probability
Scientific paper
Although they generally receive less attention, wide compact object binaries presumably outnumber their close cousins. Bolstered by our population synthesis results predicting the existence of white dwarf pairs (WDWDs) with up to parsec separations, we search for wide WDWDs using as our candidate primaries the 12,000 spectroscopically confirmed hydrogen-atmosphere WDs recently identified in the Sloan Digital Sky Survey. Our method is adapted from that of Dhital et al. and identifies candidate common proper motion WDWDs at angular separations of up to 10'. We use a Monte Carlo Galactic model to determine each candidate binary's false positive probability and uncover a significant number of new candidate wide WDWDs pairs. These pairs can serve as a probe of the cumulative effect of perturbations from distant stars in the Galactic disk and of the differential pull of the Galactic tidal potential. Spectroscopic follow-up will allow us to examine the radial velocities of these candidate binaries, as well as constrain WD cooling curves and the initial-final mass ratio for WDs.
Agüeros Marcel
Andrews Jeffrey
Belczynski Krzysztof
Dhital Saurav
Kleinman Scot
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