Identification of the TW Hydrae association member 2M1235-39: a tertiary component of the HR 4796 system
Aims. We seek to determine whether the late-type star 2MASS J12354893-3950245 (2M1235-39) is a member of the TW Hya Association (TWA), a hypothesis suggested by its association with a bright X-ray source detected serendipitously by ROSAT and XMM-Newton and its (∼3′) proximity to the well-studied (A+M binary) system HR 4796.Methods. We used optical spectroscopy to establish the Li and Hα line strengths of 2M1235-39, and determined its proper motion via optical imaging. We also considered its...[Show more]
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