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Time-resolved photometry and spectroscopy of the new deeply-eclipsing SW Sextantis star HS 0728+6738
- Source :
- Astronomy & Astrophysics. 424:647-655
- Publication Year :
- 2004
- Publisher :
- EDP Sciences, 2004.
-
Abstract
- We present time-resolved optical spectroscopy and photometry, and far-ultraviolet spectroscopy of HS 0728+6738, a cataclysmic variable discovered in the Hamburg Quasar Survey. We show that the system is a new eclipsing member of the SW Sex class of CVs with an orbital period of 3.21 hours. We derive an orbital inclination of ~85 +- 4 degrees from the average eclipse profile, making HS 0728+6738 the highest inclination SW Sex star known. The optical and far-ultraviolet emission lines are not or only weakly occulted during the eclipse, indicating the presence of line-emission sites either far outside the Roche lobe of the primary or, more likely, above the orbital plane of the binary. The photometric light curves exhibit fast variability with a period of \~7 min, which might be related to the spin of the white dwarf.<br />Comment: 9 pages, 11 figures, accepted for publication in A&A
- Subjects :
- Physics
Orbital plane
Astrophysics::High Energy Astrophysical Phenomena
Astrophysics (astro-ph)
FOS: Physical sciences
White dwarf
Cataclysmic variable star
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Light curve
Orbital period
Orbital inclination
Space and Planetary Science
Astrophysics::Solar and Stellar Astrophysics
Roche lobe
Astrophysics::Earth and Planetary Astrophysics
Astrophysics::Galaxy Astrophysics
QB
Eclipse
Subjects
Details
- ISSN :
- 14320746 and 00046361
- Volume :
- 424
- Database :
- OpenAIRE
- Journal :
- Astronomy & Astrophysics
- Accession number :
- edsair.doi.dedup.....01162c95dd56edaccb6468124e81d1c0