A New Brown Dwarf Desert? A Scarcity of Wide Ultracool Binaries
| dc.creator | Allen, Peter R. | |
| dc.creator | Koerner, David W. | |
| dc.creator | McElwain, Michael W. | |
| dc.creator | Cruz, Kelle L. | |
| dc.creator | Reid, I. Neill | |
| dc.date | 2006-10-25 | |
| dc.date.accessioned | 2026-07-07T11:26:14Z | |
| dc.date.available | 2026-07-07T11:26:14Z | |
| dc.description | We present the results of a deep-imaging search for wide companions to low-mass stars and brown dwarfs using NSFCam on IRTF. We searched a sample of 132 M7-L8 dwarfs to magnitude limits of $J \sim 20.5$ and $K \sim 18.5$, corresponding to secondary-primary mass ratios of $\sim 0.5$. No companions were found with separations between $2{\arcsec}$ to $31{\arcsec}$ ($\sim$40 AU to $\sim$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 $0.05 M_{\odot}$ and 50% above $0.03 M_{\odot}$. | |
| dc.description | 27 pages, 8 figures, 3 tables: accepted to the Astronomical Journal | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0610763 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0610763 | |
| dc.identifier | Astron.J.133:971-978,2007 | |
| dc.identifier | doi:10.1086/510346 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195763 | |
| dc.subject | Astrophysics | |
| dc.title | A New Brown Dwarf Desert? A Scarcity of Wide Ultracool Binaries | |
| dc.type | text |