The overcontact binary RZ Tauri |
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| Institution: | 2. Desert Blooms Observatory, Benson, AZ, U.S.A.;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. Astronomy Department, National Research Institute of Astronomy and Geophysics, (NRIAG), Helwan, Cairo, Egypt;2. Kottamia Center of Scientific Excellence in Astronomy and Space Sciences (KCScE), STDF, ASRT, Cairo, Egypt;1. The International Occultation Timing Association Middle East Section, Iran, info@iota‐me.com;2. The Seventh IOTA/ME Summer School of Astronomy, Astronomical Research Center, Qom, Iran;3. Astrophysics Research Centre and Observatory, Çanakkale Onsekiz Mart University, Terzio?lu Kampüsü, TR-17020, Çanakkale, Turkey;1. Via Don G. Minzoni 26/D, Magnago (MI) 20020, Italy;2. Via Zoncada 51, Codogno (LO) 26845, Italy;3. Via Molinetto 35, Triulza di Codogno (LO) 26845, Italy;1. Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China;2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China;3. University of the Chinese Academy of Sciences, Beijing 100049, China;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: | The first reliable radial velocity curves for RZ Tau have been obtained. Combined with new light curve (LC) data, simultaneous Roche-based light curve analyses have been carried out using the 2003 version of the Wilson-Devinney code. New values for the masses and radii have been obtained: M1 = 1.53 (4) M?, M2 = 0.57 (2) M?, and R1 = 1.50 (4) R?, R2 = 0.99 (2) R?. Although there is a multitude of spectral classifications listed in the literature, the classification of F0 from Struve et al. (1950) is shown to be the most reliable. On the basis of the latter, the most likely luminosities are L1 = 4.97 (44) L? and L2 = 2.11 (19) L?. Additional modelling was carried out using the same RV data, but with LC data (binned and unbinned) from Binnendijk (1963); the results were substantially the same except that they favoured slightly later spectral sub-classes. |
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