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The Disk around the Brown Dwarf KPNO Tau 3

Abstract : We present submillimeter observations of the young brown dwarfs KPNO Tau 1, KPNO Tau 3, and KPNO Tau 6 at 450 μm and 850 μm taken with the Submillimetre Common-User Bolometer Array on the James Clerk Maxwell Telescope. KPNO Tau 3 and KPNO Tau 6 have been previously identified as Class II objects hosting accretion disks, whereas KPNO Tau 1 has been identified as a Class III object and shows no evidence of circumsubstellar material. Our 3σ detection of cold dust around KPNO Tau 3 implies a total disk mass of (4.0 ± 1.1) × 10-4 M (assuming a gas to dust ratio of 100:1). We place tight constraints on any disks around KPNO Tau 1 or KPNO Tau 6 of <2.1 × 10-4 M and <2.7 × 10-4 M , respectively. Modeling the spectral energy distribution of KPNO Tau 3 and its disk suggests the disk properties (geometry, dust mass, and grain size distribution) are consistent with observations of other brown dwarf disks and low-mass T-Tauri stars. In particular, the disk-to-host mass ratio for KPNO Tau 3 is congruent with the scenario that at least some brown dwarfs form via the same mechanism as low-mass stars.
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Submitted on : Thursday, March 24, 2022 - 2:07:37 PM
Last modification on : Friday, March 25, 2022 - 4:02:40 AM

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Hannah Broekhoven-Fiene, Brenda Matthews, Gaspard Duchêne, James Di Francesco, Aleks Scholz, et al.. The Disk around the Brown Dwarf KPNO Tau 3. The Astrophysical Journal, 2014, 789, ⟨10.1088/0004-637X/789/2/155⟩. ⟨insu-03618556⟩

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