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A. A. LaPage (University of Rochester), D. W. Koerner, D. Labrier, P. Brammeier, J. Keller, A. Case (Northern Arizona Univeristy)
We report preliminary results from a search for substellar companions to all stars within the NStars Database: a catalogue of all stars known to be within 25 pc by virture of having a well-established trigonometric parallax. Our survey uses the 2MASS, GSC, and USNOB point source catalogs to color- and magnitude-select a list of all candidate companions within a projected separation of 20,000 AU. Visual inspection is used to eliminate non-stellar sources whenever possible. Common proper motion, when available from multi-epoch survey data, is also used to test for multiple system membership. The end product of this survey will be upper limits for the presence of wide companions, together with a minimized candidate list for follow-up confirmation of possible substellar companions. This work is supported by NSF grant AST-0453611 and promises to yield a milestone in the comprehensive survey of wide binary companions below the hydrogen-burning mass limit.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.