摘要: I report the results of a survey for low-mass (0.030 M? M 0.013 M?) brown dwarfs in direction TW Hya association using Two Micron All Sky Survey (2MASS). late show signs low surface gravity and are strong candidates to be young, very mass (M ? 0.025 related association. The object 2MASSW J1207334-393254 is particularly notable its H? emission. number detected consistent with substellar function richer star formation environments. Newly identified L field also discussed. Unusual objects include an dwarf emission, possible wide M8-M9 triple system, companion LHS star.
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