A study on the O-C diagram and pulsation behaviour of KZ Hydra

被引：4
|
作者：
Kim, Chulhee [1 ]
Kim, S. -L.
Jeon, Y. -B.
Kim, C. -H.
Gilmore, A.
机构：
[1] Chonbuk Natl Univ, Div Sci Educ, Chonju, South Korea
[2] Chonbuk Natl Univ, Inst Sci Educ, Chonju, South Korea
[3] Korea Astron & Space Sci Inst, Taejon 305348, South Korea
[4] Chungbuk Natl Univ, Dept Astron & Space Sci, Cheongju, South Korea
[5] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2007年 / 312卷 / 1-2期
关键词：
stars; oscillation; variables (delta Scuti); individual (KZ Hya); Stars; binary systems; blue stragglers;
D O I：
10.1007/s10509-007-9610-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
New differential time-series observations of KZ Hya were secured using the V filters, and 28 new times of light maximum were identified. We collected 157 times of light maximum from the literature, unpublished data and open database, and proceeded to investigate the variations of the O-C values for light maxima with the total of 185 times of light maximum. A quasi-sinusoidal character of the O-C diagram was confirmed, and this was interpreted as a light travelling time effect due to a companion moving in an eccentric (e=0.23) orbit with a period of about 24.77 years. The periods of KZ Hya were investigated and nine frequencies were determined using the Fourier decomposition method. All nine were harmonic frequencies and no other frequency was identified.
引用
收藏
页码：41 / 46
页数：6
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