Rapid apsidal motion in V381 Cassiopeiae

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Authors	WOLF Marek ŠMELCER Ladislav KUČÁKOVÁ Hana HYNEK Tomáš ONDERKOVÁ Kateřina SVOBODA Petr CHRASTINA Marek
Year of publication	2010
Type	Article in Periodical
Magazine / Source	New Astronomy
MU Faculty or unit	Faculty of Science
Citation
web	http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TJK-4Y3TXGF-1&_user=835458&_coverDate=08%2F31%2F2010&_alid=1444702598&_rdoc=1&_fmt=high&_orig=search&_origin=search&_zone=rslt_list_item&_cdi=5313&_sort=r&_st=13&_docanchor=&view=c&_ct=1&_acct=C0
Field	Astronomy and astrophysics
Keywords	binaries; eclipsing binaries; V381 Cas; fundamental parameters
Description	V381 Cas is a relatively bright and early-type eclipsing binary system. Several new times of its eclipses were measured as part of our long-term observational project of eccentric eclipsing binaries. Based on a current O-C diagram solution, we found for the first time that its orbit is slightly eccentric (e = 0.025) and shows a very rapid apsidal advance with short period of about 20 years only. The relativistic and third body effects are negligible, being about 3% of the total apsidal motion rate.
Related projects:	Spectral energy distribution of hot stars and its variability