1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00099154" target="_blank" >RIV/00216224:14310/17:00099154 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.newast.2017.01.007" target="_blank" >http://dx.doi.org/10.1016/j.newast.2017.01.007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.newast.2017.01.007" target="_blank" >10.1016/j.newast.2017.01.007</a>

Result language
angličtina
Original language name
1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit
Original language description
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 230 K hotter than the secondary component. Based on our new CCD eclipse times, the orbital period change was analyzed. According to 0 C diagram, the orbital period of the 1SWASP 1200503.05-343726.5 shows an increase at a rate of <(P)over dot> = +5.43 x 10(-8) days year(-1). 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. (C) 2017 Elsevier B.V. All rights reserved.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/LG15010" target="_blank" >LG15010: F. Magellanes: support of ground- and space-based study of stars and stellar systems in the Galaxy and Magellanic clouds</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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