Long-term variable modes in the δ Scuti variable DQ Cephei

被引：0
|
作者：
Udovichenko, SN
机构：
[1] Odessa II Mechnikov State Univ, Astron Observ, UA-65014 Odessa, Ukraine
[2] Isaac Newton Inst Chile, Odessa Branch, Odessa, Ukraine
来源：
ASTRONOMICAL JOURNAL | 2002年 / 123卷 / 04期
关键词：
delta Scuti; stars : individual (DQ Cephei);
D O I：
10.1086/339309
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Differential CCD photometry of the delta Scuti type star DQ Cephei has been carried out over 10 nights (about 55 hr) in 1998. Frequency analysis of the data confirms two pulsation modes, at f(1) = 12.68 cycles day(-1) and f(2) = 8.049 cycles day(-1). Comparing these observations with results from past years, one can see an amplitude variation in both modes. The variation period will be longer than 50 yr, and the amplitudes of the modes vary with opposite phase.
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收藏
页码：2042 / 2044
页数：3
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