Photometric Variation of Two Brown Dwarfs in the TW Hya Association

Details Photometric Variation of Two Brown Dwarfs in the TW Hya Association Photometric Variation of Two Brown Dwarfs in the TW Hya Association

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..596h&link_type=abstract

NOAO Proposal ID #2007A-0596

Physics

Scientific paper

Based on the equivalent width of their respective H(alpha) emission lines and the estimated age (8-10 My) of the TW Hydra Association that they are believed to belong to, we believe that the brown dwarfs 2MASS J12073346-3932539 (2m1207)and 2MASS 11395113-3159214 (2m1139) are nearing the end of the T Tauri phase of their lives. 2m1207 would be a classical T Tauri brown dwarf and 2m1139 would already be in the weak- lined T Tauri brown dwarf phase (assuming the CTT stars evolve into WTT stars). We propose to characterize these two stars photometrically and look for rotational periodicities. We may see fluctuations in the accretion rate on 2m1207.

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