A photometric study of two recently discovered,contact binaries-II: UCAC4 479-113658 and UCAC4 479-113711 |
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| Institution: | 1. Department of Astronomy, National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo 11421, Egypt;2. Issac Newton Institute of Chile, Yugoslavia Branch, Serbia;3. Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia;4. Department of Astronomy and Meteorology and Space Science, Faculty of Science, Cairo University, Cairo, Egypt;1. The International Occultation Timing Association Middle East section, Iran;2. Adana Organised Industrial Zones Vocational School of Technical Science, University of Çukurova, 01410, Adana, Turkey;3. Space Science and Solar Energy Research and Application Center (UZAYMER), University of Çukurova, 01330, Adana, Turkey;1. Department of Space Sciences and Technologies, Faculty of Arts and Sciences, Çanakkale Onsekiz Mart University, Terzio?lu Kampüsü, Çanakkale TR-17020, Turkey;2. Department of Physics, Faculty of Arts and Sciences, Çanakkale Onsekiz Mart University, Terzio?lu Kampüsü, Çanakkale TR-17020, Turkey;3. Çanakkale Onsekiz Mart University, Astrophysics Research Centre and Ulup?nar Observatory, Çanakkale TR-17020, Turkey;1. Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;4. Qian Xuesen Laboratory of Space Technology, NO. 104, Youyi Road, Haidian District, Beijing 100094, China;5. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;6. School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China |
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| Abstract: | In a previous paper, we have presented photometric studies of four recently discovered contact binaries (Djura?evi?, et al., 2016; hereafter Paper I) that were observed by the 1.88 m telescope of the Kottamia Astronomical Observatory (KAO) in Egypt. In this paper we continue studying two more recently discovered, by some of us, contact binaries UCAC4 479-113658 and UCAC4 479-113711, and analyze their light curves to determine orbital and physical parameters using the modeling program of G. Djura?evi? as in Paper I. The analysis shows that the two systems are W UMa contact binaries of late type main-sequence stars with a bright spot on the secondary less massive cool star of the first system; and spot on each component of the later system. We also conclude that both systems are most likely to be of the A-type class. |
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