کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5487770 | 1523724 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
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![عکس صفحه اول مقاله: 1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit 1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit](/preview/png/5487770.png)
چکیده انگلیسی
First CCD photometric light curves of the eclipsing binary system 1SWASP J200503.05-343726.5 are presented. Our complete light curves in V, R and I bands using the Bessell filter show an out-of-eclipsing distortion, which means that the components of the system may be active. The preliminary photometric solutions with a cool star-spot are derived by using the 2013 version of the Wilson-Devinney (W-D) code. The photometric solutions suggest that 1SWASP J200503.05-343726.5 is a shallow-contact eclipsing binary(f=9.0%) with a mass ratio of q=1.0705, which is very high for late-type binary systems near the period limit. The primary component is about 230Â K hotter than the secondary component. Based on our new CCD eclipse times, the orbital period change was analyzed. According to OâC diagram, the orbital period of the 1SWASP J200503.05-343726.5 shows an increase at a rate of PË=+5.43Ã10â8 days yearâ1. The period increase may be caused by mass transfer from the less massive component to the more massive one. This shallow-contact system may be formed from a detached short-period binary via orbital shrinkage because of dynamical interactions with a third component or by magnetic braking.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 54, July 2017, Pages 52-55
Journal: New Astronomy - Volume 54, July 2017, Pages 52-55
نویسندگان
Zhang Bin, Qian Shengbang, Miloslav Zejda, Zhu Liying, Liu Nianping,