NOAO >   Observing Info >   Approved Programs >   2007A-0225

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Proposal Information for 2007A-0225


PI: Peter Allen, Pennsylvania State University, pallen@astro.psu.edu
Address: Astronomy Department, 525 Davey Lab, University Park, Pennsylvania 16802, USA

Title: Wide Ultracool Companions to Spectroscopic Binaries: Testing Star Formation Simulations

Abstract: The wide brown dwarf binary rate of spectroscopic binaries is predicted by certain star formation simulations to be considerably higher than that of single stars (10% versus 1-2%). I will test this hypothesis in a robust, statistically significant manner by measuring the wide brown dwarf binary rate of a large, volume-complete sample of 120 known spectroscopic binaries within 30 pc of the Sun. This measurement will be made through a common proper motion search, with the 2MASS database serving as the first epoch and the proposed observations as the second epoch. These observations will identify previously unknown nearby ultracool dwarfs, which are excellent targets for detailed follow-up observations.


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 >   2007A-0225

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