Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 764, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/764/2/L27
Keywords
brown dwarfs; circumstellar matter; planets and satellites: formation; stars: individual (2MASS J044427+2512); submillimeter: stars
Categories
Funding
- NSF grant [AST-1109334, AST-1140063]
- Gordon and Betty Moore Foundation
- Kenneth T. and Eileen L. Norris Foundation
- James S. McDonnell Foundation
- Associates of the California Institute of Technology, University of Chicago, states of California, Illinois, Maryland
- CARMA partner universities
- Owens Valley Radio Observatory
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1140063] Funding Source: National Science Foundation
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We present CARMA 1.3 mm continuum data of the disk surrounding the young brown dwarf 2MASS J044427+2512 in the Taurus molecular cloud. The high angular resolution of the CARMA observations (0.'' 16) allows us to spatially resolve for the first time the thermal emission from dust around a brown dwarf. We analyze the interferometric visibilities and constrain the disk outer radius adopting disk models with power-law radial profiles of the dust surface density. In the case of a power-law index <= 1, we obtain a disk radius in the range of about 15-30 AU, while larger disks are inferred for steeper radial profiles. By combining this information on the disk spatial extent with the sub-mm spectral index of this source, we find conclusive evidence for mm-sized grains, or larger, in this brown dwarf disk. We discuss the implications of our results on the models of dust evolution in protoplanetary disks and brown dwarf formation.
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