A Disk Census for Young Brown Dwarfs | Zendy

Ray Jayawardhana | Zendy; D. R. Ardila | Zendy; B. Stelzer | Zendy; Karl E. Haisch | Zendy

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A Disk Census for Young Brown Dwarfs

Author(s) -

Ray Jayawardhana,

D. R. Ardila,

B. Stelzer,

Karl E. Haisch

Publication year - 2003

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/377144

Subject(s) - brown dwarf , physics , astrophysics , stars , telescope , infrared telescope , astronomy , t tauri star , stellar classification , planetary system , infrared

Recent surveys have identified sub-stellar objects down to planetary massesin nearby star-forming regions. Reliable determination of the disk frequency inyoung brown dwarfs is of paramount importance to understanding their origin.Here we report the results of a systematic study of infrared L'-band(3.8-micron) disk excess in ~50 spectroscopically confirmed objects near andbelow the sub-stellar boundary in several young clusters. Our observations,using the ESO Very Large Telescope, Keck I and the NASA Infrared TelescopeFacility, reveal that a significant fraction of brown dwarfs harbor disks at avery young age. Their inner disk lifetimes do not appear to be vastly differentfrom those of disks around T Tauri stars. Our findings are consistent with thehypothesis that sub-stellar objects form via a mechanism similar to solar-massstars.Comment: accepted for publication in The Astronomical Journa

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