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Time-resolved photometry and spectroscopy of the new deeply-eclipsing SW Sextantis star HS 0728+6738
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Rodríguez-Gil, P., Gaensicke, B. T., Barwig, H., Hagen, H.-J. and Engels, Dieter (2004) Time-resolved photometry and spectroscopy of the new deeply-eclipsing SW Sextantis star HS 0728+6738. Astronomy & Astrophysics, Vol.424 (No.2). pp. 647-655. doi:10.1051/0004-6361:20040408 ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361:20040408
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 h. We derive an orbital inclination of ∼85 ± 4◦ 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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Cataclysmic variable stars | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | EDP Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | September 2004 | ||||
| Dates: |
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| Volume: | Vol.424 | ||||
| Number: | No.2 | ||||
| Page Range: | pp. 647-655 | ||||
| DOI: | 10.1051/0004-6361:20040408 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Funder: | Particle Physics and Astronomy Research Council (Great Britain) (PPARC), Deutsche Forschungsgemeinschaft (DFG) | ||||
| Grant number: | Re 353/11 (DFG), Re 353/22 (DFG) |
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