The multi-band CCD photometric investigation of short-period eclipsing binary V1044 Her |
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| Institution: | 1. College of Science/Department of Physics & NAOC-GZU-Sponsored Center for Astronomy Research, Guizhou University, Guiyang 550025, PR China;2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, PR China;3. Department of Physics and Astronomy, Butler University, Indianapolis, IN 46208, USA;1. INAF- Catania Astrophysical Observatory, via S.Sofia, 78 I-95123 Catania, Italy;2. Montcabrer Observatory, C/Jaume Balmes, 24, Cabrils, Spain;3. Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263129, India;1. Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1121 Budapest, Konkoly Thege Miklós út 15-17, Hungary;2. BSObservatory, Modrá 587, Zlín 760 01, Czech Republic |
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| Abstract: | We present new CCD photometric observations of V1044 Her obtained on May 22, 23 and 24, 2015. From our data, we derived five new light curve minimum times. Combining our new results with previously available CCD light minimum times, we derived an updated ephemeris and discovered that the period of this binary system exhibits an oscillation. The cyclic variation may be caused by the light-time effect via the presence of a third body or magnetic activity cycle. We calculated the corresponding period of the third body to be 14.1 ± 1.4 years or magnetic cycle to be 12.2 ± 0.7 years. We analyzed our new asymmetric light curves to obtain photometric solutions and starspot parameters using the Wilson and Devinney program. The final results show that V1044 Her is a contact binary system with a degree of contact factor f = 3.220( ± 0.002)%. |
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