Physical Parameters of Late-type Contact Binaries in the Northern Catalina Sky Survey
Sun,Weijia1,2,3,4; Chen,Xiaodian2,5,6; Deng,Licai2,5,6; de Grijs,Richard3,4,7
Source PublicationThe Astrophysical Journal Supplement Series
AbstractAbstract We present the physical parameters of 2335 late-type contact binary (CB) systems extracted from the Catalina Sky Survey (CSS). Our sample was selected from the CSS Data Release 1 by strictly limiting the prevailing temperature uncertainties and light-curve fitting residuals, allowing us to almost eliminate any possible contaminants. We developed an automatic Wilson–Devinney-type code to derive the relative properties of CBs based on their light-curve morphology. By adopting the distances derived from CB (orbital) period–luminosity relations (PLRs), combined with the well-defined mass–luminosity relation for the systems’ primary stars and assuming solar metallicity, we calculated the objects’ masses, radii, and luminosities. Our sample of fully eclipsing CBs contains 1530 W-, 710 A-, and 95 B-type CBs. A comparison with literature data and with the results from different surveys confirms the accuracy and coherence of our measurements. The period distributions of the various CB subtypes are different, hinting at a possible evolutionary sequence. W-type CBs are clearly located in a strip in the total mass versus mass-ratio plane, while A-type CBs may exhibit a slightly different dependence. There are no significant differences among the PLRs of A- and W-type CBs, but the PLR zero-points are affected by their mass ratios and fill-out factors. Determination of zero-point differences for different types of CBs may help us improve the accuracy of the resulting PLRs. We demonstrate that automated approaches to deriving CB properties could be a powerful tool for application to the much larger CB samples expected to result from future surveys.
KeywordAstronomy data analysis contact binary stars fundamental parameters of stars
WOS IDIOP:0067-0049-247-2-ab7894
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People’s Republic of China;
2.Key Laboratory for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China;
3.Department of Physics and Astronomy, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia
4.Centre for Astronomy, Astrophysics and Astrophotonics, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia
5.School of Astronomy and Space Science, University of the Chinese Academy of Sciences, Huairou 101408, People’s Republic of China
6.Department of Astronomy, China West Normal University, Nanchong 637002, People’s Republic of China
7.International Space Science Institute–Beijing, 1 Nanertiao, Hai Dian District, Beijing 100190, People’s Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Sun,Weijia,Chen,Xiaodian,Deng,Licai,et al. Physical Parameters of Late-type Contact Binaries in the Northern Catalina Sky Survey[J]. The Astrophysical Journal Supplement Series,2020,247(2).
APA Sun,Weijia,Chen,Xiaodian,Deng,Licai,&de Grijs,Richard.(2020).Physical Parameters of Late-type Contact Binaries in the Northern Catalina Sky Survey.The Astrophysical Journal Supplement Series,247(2).
MLA Sun,Weijia,et al."Physical Parameters of Late-type Contact Binaries in the Northern Catalina Sky Survey".The Astrophysical Journal Supplement Series 247.2(2020).
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