| Issue |
A&A
Volume 415, Number 1, February III 2004
|
|
|---|---|---|
| Page(s) | 265 - 272 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20034378 | |
| Published online | 03 February 2004 | |
A new strongly X-ray flaring M 9 dwarf in the solar neighborhood*
1
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
2
Institut für Astrophysik der Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
3
MPI für extraterrestrische Physik, Gissenbachstrasse 1, 85740 Garching, Germany
4
Astrophysikalisches Institut, Universität Jena, Schillergässchen 2-3, 07745 Jena, Germany
Corresponding author: V. Hambaryan, vhambaryan@aip.de
Received:
23
September
2003
Accepted:
7
October
2003
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 
and a
distance of ≈
pc. The optical counterpart of
1RXS J115928.5-524717 shows a large proper motion of 
/year.
1RXS J115928.5-524717 is the fourth object among the VLM stars displaying a huge
X-ray flare, reaching the unprecedent value of 
.
Key words: methods: data analysis / X-rays: stars / stars: low-mass, brown dwarfs / stars: distances / stars: flare / stars: individual: 1RXS J115928.5-524717
© ESO, 2004
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