We present the results of a deep-imaging search for wide companions to low-mass stars and brown dwarfs using NSFCam on the Infrared Telescope Facility. We searched a sample of 132 M7-L8 dwarfs to magnitude limits of J ∼ 20.5 and K ∼ 18.5, corresponding to secondary-to-primary mass ratios of ∼0.5. No companions were found with separations between 2″ and 31″ (∼40 to ∼1000 AU). This null result implies a wide companion frequency below 2.3% at the 95% confidence level within the sensitivity limits of the survey. Preliminary modeling efforts indicate that we could have detected 85% of companions more massive than 0.05 M⊙ and 50% above 0.03 M ⊙.
- Binaries: general
- Stars: low-mass, brown dwarfs
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
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Cruz, K. L. (Contributor), McElwain, M. W. (Contributor), Koerner, D. W. (Contributor), Allen, P. R. (Contributor) & Reid, I. N. (Contributor), Strasbourg Astronomical Data Center, Jan 1 2007