The oEA stars QY Aql, BW Del, TZ Dra, BO Her and RR Lep: photometric analysis, frequency search and evolutionary status

被引：18
作者：
Liakos, A. [1 ]
Niarchos, P. [1 ]
机构：
[1] Natl & Kapodistrian Univ Athens, Dept Astrophys Astron & Mech, Athens 15784, Greece
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2013年 / 343卷 / 01期
关键词：
Methods: data analysis; Methods: observational; Stars: binaries: eclipsing; Stars: fundamental parameters; Stars: variables: delta Scuti; Stars: evolution; Stars: individual: QY Aql; BW Del; TZ Dra; BO Her; RR Lep; ECLIPSING BINARIES; PERIOD CHANGES; CATALOG; LIGHT; COMPONENTS; SYSTEM;
D O I：
10.1007/s10509-012-1237-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
New and complete multi-band light curves of the oEA stars QY Aql, BW Del, TZ Dra, BO Her and RR Lep were obtained and analysed with the Wilson-Devinney code. The light curves residuals were further analysed with the Fourier method in order to derive the pulsation characteristics of the oscillating components. All the reliable observed times of minimum light were used to examine orbital period irregularities. The orbital period analyses revealed secular changes for QY Aql and BW Del, while the Light-Time Effect seems to be the best explanation for the cyclic period changes in TZ Dra and BO Her. RR Lep has a rather steady orbital period. Light curve solutions provided the means to calculate the absolute parameters of the components of the systems, which subsequently were used to make an estimate of their present evolutionary status.
引用
收藏
页码：123 / 133
页数：11
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