In:
Publications of the Astronomical Society of Japan, Oxford University Press (OUP), Vol. 60, No. 3 ( 2008-06-25), p. 565-569
Abstract:
The CCD photometric data of an EW-type binary, IICMa, which is a contact star in the field of the middle-aged open cluster Berkeley 33, are presented. A complete $R$ light curve was obtained. In the present work, using the five CCD epochs of light minimum [three of them were calculated from Mazur et al. (1993 MNRAS, 265, 405)’s data and two from our new data], the orbital period $P$ was revised to 0.22919704 days. The complete $R$ light curve was analyzed by using the 2003 version of W-D (Wilson-Devinney) program. It is found that this is a contact system with a mass ratio of $q=0.9$ and a contact factor of $f=4.1$%. The high mass ratio ($q=0.9$) and the low contact factor ($f=4.1$%) indicate that the system just evolved into the marginal contact stage.
Type of Medium:
Online Resource
ISSN:
2053-051X
,
0004-6264
DOI:
10.1093/pasj/60.3.565
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2008
detail.hit.zdb_id:
2206640-8
detail.hit.zdb_id:
2083084-1
SSG:
16,12
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