Time-resolved Spectrophotometry of the Cataclysmic Variable EX Hydrae
Abstract
EX Hya is an unusual, eclipsing dwarf nova. In addition to its 98 min orbital period there is a 67 min photometric period which is also seen in the X-ray portion of the spectrum. The authors present the results of a study based on 264 time-resolved optical spectra. Both the emission-line strengths and widths are strongly modulated with the 67 min period, and the two sides of the emission-line profiles are phase-shifted with respect to each other. The data are consistent with a model of an intermediate polar, where a significant fraction of the line emission originates from accretion funnels above the misaligned magnetic poles of the white dwarf.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1987
- DOI:
- 10.1086/165325
- Bibcode:
- 1987ApJ...317..765K
- Keywords:
-
- Cataclysmic Variables;
- Dwarf Novae;
- Eclipsing Binary Stars;
- Emission Spectra;
- Stellar Spectrophotometry;
- H Beta Line;
- Line Shape;
- Temporal Resolution;
- Astrophysics;
- STARS: BINARIES;
- STARS: DWARF NOVAE;
- STARS: INDIVIDUAL CONSTELLATION NAME: EX HYDRAE