Infrared spectroscopy of the supersoft X-ray source MR Vel

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作者：
Mennickent, R.E. [1 ]
Matsumoto, K. [2 ]
Diaz, M. [3 ]
机构：
[1] Departamento de Física, Fac. de Ciencias Fisicas Matematicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile
[2] Grad. Sch. of Natural Sci. Technol., Okayama University, Okayama 700-8530, Japan
[3] Instituto Astronomico e Geofisico, Universidade de Sao Paulo, São Paulo, Brazil
来源：
| 1600年 / EDP Sciences卷 / 402期
关键词：
Galaxies - Infrared spectroscopy - Oxygen - Spectrum analysis - Wind - X rays;
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摘要：
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, He I, He II 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.
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