Volume 402, Number 1, April IV 2003
|Page(s)||315 - 319|
|Section||Stellar structure and evolution|
|Published online||07 April 2003|
Infrared spectroscopy of the supersoft X-ray source MR Vel
Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Concepción, Casilla 160-C, Concepción, Chile
2 Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
3 Instituto Astronômico e Geofísico, Universidade de São Paulo, Brazil
Corresponding author: R. E. Mennickent, firstname.lastname@example.org
Accepted: 14 February 2003
We describe the infrared spectrum of the galactic supersoft X-ray source MR Vel (RX J0925.7–4758) in the wavelength range of 1.1-2.6 μm. We find Paschen, Brackett, , and neutral and ionized oxygen lines in emission. No traces of the secondary star were found. P-Cygni profiles were observed in Paschen β and Brackett γ, from which we conclude that these lines arise in a wind. Fitting the optical and infrared energy distribution with a supercritical disk model, incorporating white dwarf and secondary star contributions, we were able to constrain the distance to 2-5 kpc, which implies an absolute magnitude MV between -2 and 0.
Key words: accretion, accretion disks - stars: emission-line - X-rays: stars - infrared: stars - stars: individual: MR Vel
© ESO, 2003
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