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AD Cancri:A Contact Binary with Components in Poor Thermal Contact
Liu Qingyao; Yang Yulan
2002
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume2Issue:4Pages:369
AbstractWe present the light curve and photometric solutions of the contact binary AD Cnc.The light curve appears to exhibit a typical O’Connell effect,with Maximum I brighter than Maximum Ⅱ by 0.010mag.in V.From 1987 to 2000,the light curve showed changes of shape:the depth of the primary eclipse increased by about 0.056^m while that of the secondary eclipse decreased by about 0.032^m,so the difference between the primary and the secondary eclipses increased by about 0.088^m,while there was no obvious variation in the O’Connell effect.Using the present and past times of minimun light,the changes in the orbital period of the system are analyzed.The result reveals that the orbital period of AD Cnc has continuously increased at a rate of dp/dt=4.4×10~(-7)day yr~(-1).The light curve is analyzed by means of the latest version of the Wilson-Devinney code.The results show that AD Cnc is a W-subtype contact binary with a small mass ratio of 0.267 and the two components are in poor thermal contact.AD Cnc has a component temperature difference exceeding 500K,and exhibits a shallow contact of 3.6The asymmetry of the light curves is explained by the star spot model.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/40197
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu Qingyao,Yang Yulan. AD Cancri:A Contact Binary with Components in Poor Thermal Contact[J]. Chinese Journal of Astronomy and Astrophysics,2002,2(4):369.
APA Liu Qingyao,&Yang Yulan.(2002).AD Cancri:A Contact Binary with Components in Poor Thermal Contact.Chinese Journal of Astronomy and Astrophysics,2(4),369.
MLA Liu Qingyao,et al."AD Cancri:A Contact Binary with Components in Poor Thermal Contact".Chinese Journal of Astronomy and Astrophysics 2.4(2002):369.
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