Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-11-03
Astron.Astrophys. 415 (2004) 265-272
Astronomy and Astrophysics
Astrophysics
8 pages, 5 figures. A&A, accepted
Scientific paper
10.1051/0004-6361:20034378
We report on the discovery of a very low mass (VLM) star in the solar neighborhood, originally identified as an optical counterpart of a flaring X-ray source detected in the ROSAT All-Sky survey. Optical spectroscopy and infrared photometry consistently reveal a spectral type of M9 \pm 0.5 and a distance of ~11 pm 2pc. The optical counterpart of 1RXS J115928.5-524717 shows a large proper motion of 1.08\pm0.06 "/year. 1RXS~J115928.5-524717 is the fourth object among the VLM stars displaying a huge X-ray flare, reaching the unprecedent value of L_X/L_{bol}~0.1.
Hambaryan Valeri V.
Kimeswenger Stefan
Neuhäuser Ralph
Scholz Ralf-Dieter
Schwope Axel D.
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