NDLI: Photometry of the SW Sextantis-type nova-like BH Lyncis in high state

Content Provider	EDP Sciences
Author	V. Stanishev Z. Kraicheva V. Genkov
Abstract	Aims.We present a photometric study of the deeply eclipsing SW Sex-type nova-like cataclysmic variable star BH Lyn.Methods.Time-resolved V-band CCD photometry was obtained for seven nights between 1999 and 2004.Results.We determined 11 new eclipse timings of BH Lyn and derived a refined orbital ephemeris with an orbital period of 0155875577(14). During the observations, BH Lyn was in high-state with mag. The star presents ~1.5 mag deep eclipses with mean full-width at half-flux of . The eclipse shape is highly variable, even changing form cycle to cycle. This is most likely due to accretion disc surface brightness distribution variations, most probably caused by strong flickering. Time-dependent accretion disc self-occultation or variations of the hot spot(s) intensity are also possible explanations. Negative superhumps with period of are detected in two long runs in 2000. A possible connection between SW Sex and negative superhump phenomena through the presence of tilted accretion disc is discussed, and a way to observationally test this is suggested.
Ending Page	226
Starting Page	223
Page Count	4
File Format	HTM / HTML PDF
ISSN	00046361
Alternate Webpage(s)	https://www.aanda.org/articles/aa/abs/2006/31/aa4530-05/aa4530-05.html
e-ISSN	14320746
Issue Number	1
Journal	Astronomy & Astrophysics
Volume Number	455
DOI	10.1051/0004-6361:20054530
Language	English
Publisher	EDP Sciences
Publisher Date	2006-08-01
Access Restriction	Open
Rights Holder	© ESO, 2006
Subject Keyword	accretion, accretion discs stars: binaries: eclipsing stars: individual: BH Lyn stars: novae, cataclysmic variables accretion, accretion discs / stars: binaries: eclipsing / stars: individual: BH Lyn / stars: novae, cataclysmic variables
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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