High-velocity winds in close binaries with accretion disks. II - The view along the plane of the disk

Details High-velocity winds in close binaries with accretion disks. II - The view along the plane of the disk High-velocity winds in close binaries with accretion disks. II - The view along the plane of the disk

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..671c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 15, 1985, p. 671-682. Research supported by the U.S. Department

Astronomy and Astrophysics

Astrophysics

55

Eclipsing Binary Stars, Light Curve, Line Spectra, Stellar Mass Accretion, Stellar Spectrophotometry, Ultraviolet Spectra, Cataclysmic Variables, Iue, Photoionization, Wavelengths

Scientific paper

The authors present phase-resolved, ultraviolet spectra of the eclipsing cataclysmic binaries RW Trianguli and DQ Herculis. Both stars display N V λ1240, Si IV λ1400, C IV λ1549, and He II λ1640 in emission. The strongest spectral feature in both stars is C IV λ1549. In RW Tri the blue wing of this line extends to velocities of -3000 km s-1. In both stars there is a deep eclipse of the UV continuum, representing an occultation of the interior regions of an accretion disk surrounding the degenerate dwarf. None of the spectral lines in either binary system are eclipsed to the same degree as the UV continuum, indicating that the lines are formed in an extended region above and below the disk. The distinctive morphology of RW Tri's lines suggests an origin in an accelerating wind.

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