HuaLi Li; YuanGui Yang; Wei Su; HuiJuan Wang; JianYan Wei
Source Publicationresearchinastronomyandastrophysics
Abstract1RXS J201607.0+251645 is identified as an eclipsing binary. We present preliminary observations in the V band with the 0.6-m telescope for three years and extensive observations in the V and R bands with the 0.8-m telescope for six nights, respectively. The light curve of the system is EB type. Five light minimum times were obtained and the orbital period of 0.388058(d)(+/-0.00044(d)) is determined. The photometric solution given by the 2003-version of the Wilson-Devinney program suggests that the binary is a semidetached system with photometric mass ratio 0.895(+/-0.006), which is probably comprised of a G5 primary and an oversized K5 secondary. The less massive component has completely filled its Roche lobe, while the other one almost fills its Roche lobe with a filling factor of 93.4%. The system shows a varying O'Connell effect in its phase folded diagrams from 2005 to 2007, and is X-ray luminous with log L-X/L-bol similar to -3.27. Possible mechanisms to account for these two phenomena are discussed. Finally, we infer that the binary may be in thermal oscillation or may evolve into a contact binary.
Funding Project[National Natural Science Foundation of China] ; [Physik at Garching, Germany] ; [CDS, Strausbourg, France]
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
HuaLi Li,YuanGui Yang,Wei Su,et al. therosatbrightsource1rxsj2016070251645anactivealgoltypebinary[J]. researchinastronomyandastrophysics,2009,9(9):1035.
APA HuaLi Li,YuanGui Yang,Wei Su,HuiJuan Wang,&JianYan Wei.(2009).therosatbrightsource1rxsj2016070251645anactivealgoltypebinary.researchinastronomyandastrophysics,9(9),1035.
MLA HuaLi Li,et al."therosatbrightsource1rxsj2016070251645anactivealgoltypebinary".researchinastronomyandastrophysics 9.9(2009):1035.
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