UBV photometry and period variations of V 839 Ophiuchi

被引:24
作者
Akalin, A
Derman, E
机构
[1] Ankara University Observatory, Science Faculty, Tandogan 06100, Ankara
来源
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1997年 / 125卷 / 03期
关键词
binaries; eclipsing stars; individual; V; 839; Oph;
D O I
10.1051/aas:1997232
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A complete period variation analysis and new light curves of V 839 Oph together with new ephemeris data are presented. The period variation was found to be dP/dt = 3.1 10(-7) d/yr. The period increment indicates that the conservative mass transfer rate from the less massive component to the more massive one is 6.5 10(-7) M./yr. We fitted parabolic and we discuss the possible detection of sinusoidal curves to the (O-C) diagram and sinusoidal oscillations with period of about 20 yr and semi-amplitude of 0.0065 day. A simultaneous solution of the B and V light curves was computed using the Wilson-Devinney synthetic lightcurve code. The light curve solution indicates that the A-type W UMa-type system is in contact with a filling factor of similar to 39%.
引用
收藏
页码:407 / 417
页数:11
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