Absolute properties of the overcontact binary HH Boo |
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| Institution: | 1. Department of Coagulation/Haematology, Children''s Health Ireland at Crumlin, Dublin, Ireland;2. School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons Ireland, Dublin, Ireland;3. Department of Paediatric Cardiology, Children''s Health Ireland at Crumlin, Dublin, Ireland;4. Department of Paediatric Pharmacy, Children''s Health Ireland at Crumlin, Dublin, Ireland;5. School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland;6. School of Health Professions Education (SHE), Maastricht University, Maastricht, Netherlands;7. National Children''s Research Centre, Children''s Health Ireland, Dublin, Ireland;1. Ankara University, Science Faculty, Department of Astronomy and Space Sciences, Tando?an, Ankara 06100, Turkey;2. Eastern University, Department of Astronomy & Physics, St. Davids, PA 19087, USA |
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| Abstract: | We obtained multi-colour light curves of the overcontact binary system HH Boo and analysed the orbital period variation of the system. Our analysis tentatively indicates either mass transfer from the secondary to the primary or mass loss from the system at a rate of -5.04 × 10?7 M⊙ per year. Through a combined analysis of the published radial velocity curve and light curves, we determined an inclination (i) of 69°.71 ± 0°.16 and a semi-major axis (a) of 2.246 ± 0.064 R⊙ for HH Boo. The masses of the primary and secondary components were found to be 0.92 ± 0.08 M⊙ and 0.58 ± 0.06 M⊙, respectively. The radius determined for the primary was 0.98 ± 0.03 R⊙, while that determined for the secondary was 0.80 ± 0.02 R⊙. We demonstrated that HH Boo is most likely a member of the A-type subclass of W UMa binaries. |
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