An Adaptive Optics Survey for Brown Dwarfs in Stellar Systems

Details An Adaptive Optics Survey for Brown Dwarfs in Stellar Systems An Adaptive Optics Survey for Brown Dwarfs in Stellar Systems

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.3906c&link_type=abstract

American Astronomical Society Meeting 205, #39.06; Bulletin of the American Astronomical Society, Vol. 36, p.1407

Physics

Optics

Scientific paper

I present here procedures and results for the Cornell High-order Adaptive Optics Survey (CHAOS) for brown dwarf companions to stellar systems. This survey consisted of near-infrared coronagraphic observations of 80 stars out to 22 parsecs. The subsequent data analysis revealed that zero systems showed conclusive evidence for a brown dwarf companion. Accompanying Monte Carlo population simulations determined a brown dwarf companion upper limit of 9.7% for the 25-100 AU semi-major axis region. Such a value indicates, at an 89% confidence level, that the "brown dwarf desert" around stellar objects extends further than has been previously reported.

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