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Title:
The oEA stars QY Aql, BW Del, TZ Dra, BO Her and RR Lep: photometric analysis, frequency search and evolutionary status
Authors:
Liakos, A.; Niarchos, P.
Affiliation:
AA(Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens), AB(Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens)
Publication:
Astrophysics and Space Science, Volume 343, Issue 1, pp.123-133 (Ap&SS Homepage)
Publication Date:
01/2013
Origin:
SPRINGER
Abstract Copyright:
(c) 2013: Springer Science+Business Media B.V.
DOI:
10.1007/s10509-012-1237-9
Bibliographic Code:
2013Ap&SS.343..123L

Abstract

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.
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