J. van Paradijs
- SW Sextantis in an excited, low state
- Astronomy & Astrophysics
- Volume | Issue number
- 368 | 1
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
We present low-resolution spectrophotometric optical observations of the eclipsing nova-like cataclysmic variable SW Sex, the prototype of the SW Sex stars. We observed the system when it was in an unusual low state. The spectrum is characterized by the presence of strong HeII and CIV emission lines as well as the normal single peaked Palmer emission lines. The radial temperature profile of the disk follows the expected T proportional to R-3/4 only in the outer parts and flattens off inside 0.5 times the white dwarf Roche lobe radius. The single peaked emission lines originate in a region above the plane of the disk, at the position of the hot spot.
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