RW Sextantis, a disk with a hot, high-velocity wind

Details RW Sextantis, a disk with a hot, high-velocity wind RW Sextantis, a disk with a hot, high-velocity wind

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...258..209g&link_type=abstract

Astrophysical Journal, Part 1, vol. 258, July 1, 1982, p. 209-216.

Astronomy and Astrophysics

Astronomy

48

Blue Stars, Hot Stars, Stellar Mass Accretion, Stellar Spectra, Stellar Winds, Variable Stars, Absorption Spectra, Black Body Radiation, F Stars, Iue, Lyman Alpha Radiation, Stellar Spectrophotometry, Stellar Structure, Stellar Temperature, Ultraviolet Astronomy, Ultraviolet Spectra, White Dwarf Stars, Wind Velocity, X Ray Sources

Scientific paper

The continuum spectrum of the flickering blue variable RW Sex was observed from 10,000 to 1150 A. The star is a cataclysmic variable currently stabilized at maximum, and the spectrum is dominated by an accretion disk, with flat spectrum in the ultraviolet, except at more than 5000 A, where a blackbody near 7000 K is seen. A distance of 400 pc is derived, if the latter arises from an F type main sequence star. The accretion rate required is near 10 to the -8th solar masses per year. Only weak emission is seen, except for Lyman alpha; strong, broad UV absorption lines are seen with centers displaced up to -3000 km/s, with terminal velocities up to -4500 km/s, the velocity of escape from a white dwarf. The low X-ray flux may arise from absorption within an unusually dense, hot wind from the innermost portions of the disk. The estimated mass loss rate is nearly 10 to the -12th solar masses per year.

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