Infrared spectroscopy of the supersoft X-ray source MR Vel

Details Infrared spectroscopy of the supersoft X-ray source MR Vel Infrared spectroscopy of the supersoft X-ray source MR Vel

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...402..315m&link_type=abstract

Astronomy and Astrophysics, v.402, p.315-319 (2003)

Astronomy and Astrophysics

Astrophysics

Accretion, Accretion Disks, Stars: Emission-Line, X-Rays: Stars, Infrared: Stars, Stars: Individual: Mr Vel

Scientific paper

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 mu m. 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 beta and Brackett gamma , 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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