First multi-color photometric investigation of the shortest-period semi-detached binary SWASPJ222302.02+195031.8 |
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| Institution: | 1. Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, P. O. Box 110, 650216, China;2. Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, P. O. Box 110, 650216, China;3. University of Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, Beijing 100049, China;4. Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, PR China;1. Department of Mathematics, Sri Aurobindo College, University of Delhi, Malviya Nagar, New Delhi, Delhi 110017, India;2. Department of Mathematics, ARSD College, University of Delhi, Dhaula Kuan, Delhi 110021, India;3. Department of Mathematics, Deshbandhu College, University of Delhi, Kalkaji, New Delhi, Delhi 110019, India;1. Department of Physics, Hamedan Branch, Islamic Azad University, Hamedan, Iran;2. Department of Science, Hamedan University of Technology, Hamedan 65155, Iran;3. Department of Mathematics, Hamedan Branch, Islamic Azad University, Hamedan, Iran;1. Department of Astronomy & Space Sciences, Faculty of Science, Ege University, 35100 Bornova, ?zmir, Turkey;2. Department of Physics, University of Zagreb, Bijenicka cesta 32, 10000 Zagreb, Croatia;3. Department of Astronomy & Space Sciences, Erciyes University, Kayseri, Turkey;4. Department of Astronomy & Space Sciences, Graduate School of Science and Engineering, Istanbul University, 34116, Beyazt, Istanbul, Turkey;1. Department of Physics and Astronomy, Shumen University, Shumen 9700, Bulgaria;2. Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Mexico;1. Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, PR China;2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, PR China;3. University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, PR China |
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| Abstract: | SuperWASPJ222302.02+195031.8 is an eclipsing binary with an orbital period about 0.22517657 days that is close to the short-period limit of contact binaries. Multi-color photometric light curves of the short-period binary in B, V, Rc and Ic bands are presented and analyzed by using the Wilson–Devinney (W–D) method. It is discovered that the system is a semi-detached binary where the secondary component is already filling the critical Roche lobe, while the primary is filling just 77.1% of its Roche lobe. The temperature of the primary is about 4300 K, and the temperature difference between the two components is about 500 K. The asymmetries in the light curves are explained by the coverage of stellar dark spots on the less massive component via magnetic activity. An analysis of all available eclipse times suggests that there are no any changes in the O-C diagram. This may indicate that there are no mass transfers between the two components. The semi-detached configuration with the dark spot on the surface of the lobe-filling secondary and no variations in the orbital period make the binary an interesting target for further investigations. |
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