Astrophysical parameters of the massive X-ray binary 2S 0114+650.

Details Astrophysical parameters of the massive X-ray binary 2S 0114+650. Astrophysical parameters of the massive X-ray binary 2S 0114+650.

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...311..879r&link_type=abstract

Astronomy and Astrophysics, v.311, p.879-888

Astronomy and Astrophysics

Astrophysics

36

Stars: Individual: 2S 0114+650, X-Rays: Stars, Stars: Fundamental Parameters, Stars: Supergiant

Scientific paper

We present an infrared and optical study of the massive X-ray binary 2S 0114+650 = LSI +65 010. We present new data obtained as a part of the Southampton/Valencia long-term monitoring campaign of massive X-ray binaries, consisting of optical spectra, infrared photometry and both wide (Johnson) and narrow (Stroemgren) optical photometry. The data cover the period 1990-1995. The analysis of these data lead us to assess that it is a supergiant of spectral type B1 and luminosity class Ia. We are able to determine the astrophysical parameters by using empirical calibrations obtained for the Stroemgren photometric system. We explain the X-ray luminosity in terms of a simple wind-fed model, by which matter expelled from the optical companion via a stellar wind is accreted onto the neutron star.

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