A photometric study of a weak-contact binary: V873 Per |
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| Institution: | 1. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;2. National Astronomical Research Institute of Thailand, Chiang Mai 50200, Thailand;1. Departament d’Arquitectura i Tecnologia de Computadors, Universitat de Girona, Spain;2. Departamento de Física, Universidad de Jaén, Spain;3. Departament d’Astronomia i Meteorologia and Institut de Ciències del Cosmos, Universitat de Barcelona, Spain;1. Astrophysical Sciences Division, Bhabha Atomic Research Center, Mumbai 400 085, India;2. Aryabhatta Research Institute of Observational Sciences, Nainital 263 129, India;1. Facultad de Ciencias Astronómicas y Geofísicas, UNLP, Paseo del Bosque s/n, 1900 La Plata, Argentina;2. Instituto de Astrofísica de La Plata (CCT La Plata – CONICET, UNLP), Argentina;3. Observatorio Astronómico, Laprida 854, 5000 Córdoba, Argentina |
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| Abstract: | We present a photometric study of a weak-contact binary V873 Per. New observations in BVR filter bands showed asymmetric light curves to be a negative type of the O’Connell effect, which can be described by magnetic activity of a cool spot on the more massive component. Our photometric solutions showed that V873 Per is a W-type with a mass ratio of q = 2.504(±0.0029), confirming the results of Samec et al. (2009). The derived contact degree was found to be f = 18.10%(±1.36%). Moreover, our analysis found the cyclic variation with the period of about 4 yr that could be due to existence of the third companion in the system or the mechanism of magnetic activity cycle in the binary. While available data indicated that the long-term orbital period tends to be stable rather than decreasing. |
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| Keywords: | Stars: binaries: close Stars: binaries: eclipsing Stars: individual (V873 Per) |
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