Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...198..200w&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 198, no. 1-2, June 1988, p. 200-210. ZWO-supported research.
Astronomy and Astrophysics
Astrophysics
134
B Stars, Stellar Mass Ejection, Stellar Winds, X Ray Binaries, Infrared Photometry, Infrared Radiation, Ultraviolet Radiation, Visual Photometry
Scientific paper
The UV to far-IR energy distributions of 7 Be/X-ray binaries are studied. It is found that free-bound and free-free emission from the dense circumstellar equatorial disc creates an excess of IR flux in the Be stars of these systems. By studying the IR excess as a function of wavelength, the density structure of the equatorial wind is derived and the mass loss rate is found to be of the order of 1-2 X 10 to the -7th solar masses/year. These Be stars are shown to have wind characteristics similar to those of other Be stars which do not emit X-rays. X-ray fluxes during outburst are used to estimate relative wind velocities at peri-astron ranging between 150 and 600 km/s. The relative wind velocities are usually of the same order as the orbital velocities (150 to 300 km/s), showing agreement with the velocities in the equatorial disks of the Be stars derived from the IR excess.
Habets M. H. J. G.
Persi Paolo
Taylor Russ A.
van den Heuvel Edward Peter Jacobus
Waters Laurens B. F. M.
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