A Chandra Observation of a TW Hydrae Association Brown Dwarf

Abstract

We present Chandra observations of the young brown dwarf 2MASSW J1207334-393254, which is a probable member of the TW Hya association. Although this substellar object has strong H alpha emission, it has no detected X Ray flux in a fifty kilosecond ACIS-S observation. We place a conservative upper limit of 1.2 x 10^{26} erg/sec on its X-ray luminosity. We compare our M8 target to the similar mass object TWA 5B, which has weaker H alpha emission but strong X-ray emission. We argue our results are consistent with the notion that 2MASSW J1207334-393254 is interacting with a disk.

arXiv commentApJ Letter, in press

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• Giant Planet Companion to 2MASSW J1207334-393254
• The Planetary Mass Companion 2MASS1207-3932 B: Temperature, Mass and Evidence for an Edge-On Disk
• The Solar Neighborhood. XXXIII. Parallax Results from the CTIOPI 0.9m Program: Trigonometric Parallaxes of Nearby Low-Mass Active and Young Systems
• On the age of the TW Hydrae Association and 2M1207334-393254
• A Panchromatic View of Brown Dwarf Aurorae
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• X-ray emission from young brown dwarfs in the Orion Nebula Cluster
• Emission Line Variability of the Accreting Young Brown Dwarf 2MASSW J1207334-393254: From Hours to Years
• Whims of an Accreting Young Brown Dwarf: Exploring Emission Line Variability of 2MASSW J1207334-393254
• The Trigonometric Parallax of the Brown Dwarf Planetary System 2MASSW J1207334-393254
• X-ray emission of brown dwarfs: Towards constraining the dependence on age, luminosity, and temperature
• New Brown Dwarf Disks in the TW Hydrae Association
• Spitzer Observations of two TW Hydrae Association Brown Dwarfs
• BANYAN. VIII. New Low-Mass Stars and Brown Dwarfs with Candidate Circumstellar Disks
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• The 1600 Angstrom Emission Bump in Protoplanetary Disks: A Spectral Signature of H${}_2$O Dissociation
• M Stars in the TW Hya Association: Stellar X-rays and Disk Dissipation
• First Ultraviolet Spectrum of a Brown Dwarf: Evidence for H_2 Fluorescence and Accretion
• Radio Constraints on Activity in Young Brown Dwarfs
• A Chandra Observation of the TW Hydrae Association Brown Dwarf 2MASSW J1139511-315921
• Nearby Young Stars and Young Moving Groups