UNSPECIFIED. (2004) Time-resolved photometry and spectroscopy of the new deeply-eclipsing SW Sextantis star HS 0728+6738. ASTRONOMY & ASTROPHYSICS, 424 (2). pp. 647-655. ISSN 0004-6361

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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 similar to85 +/- 4degrees 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 similar to7 min, which might be related to the spin of the white dwarf.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Journal or Publication Title:	ASTRONOMY & ASTROPHYSICS
Publisher:	E D P SCIENCES
ISSN:	0004-6361
Date:	September 2004
Volume:	424
Number:	2
Number of Pages:	9
Page Range:	pp. 647-655
Identification Number:	10.1051/0004-6361:20040408
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/7971

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