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We use extensive model grids to estimate the global parameters of four partially-eclipsing W UMa contact binaries near the period cutoff. All four systems consist of K-type main sequence primaries and M-type secondaries that appear undersized and underluminous for their masses because of the energy transfer through the common envelope. Three of the four stars exhibit light curve asymmetry that is explained in terms of magnetic activity and modeled with dark spots. We discuss the reliability of the photometric mass ratios and derived absolute parameters in context of total or partial eclipses and compare them with a sample of totally-eclipsing short-period W UMa systems from the literature.
Czasopismo
Rocznik
Tom
Strony
183--194
Opis fizyczny
Bibliogr. 22 poz., rys., tab., wykr.
Twórcy
autor
- Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia
autor
- Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia
Bibliografia
- Choi, J., Dotter, A., Conroy, C., et al. 2016, ApJ, 823, 102.
- Dimitrov, D.P., and Kjurkchieva, D.P. 2015, MNRAS, 448, 2890.
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- Djurašević, G., Zakirov, M., Hojaev A., and Arzumanyants G. 1998, Astrophys. and Space Sci., 131, 17.
- Djurašević, G., Essam, A., Latković, O., et al. 2016, AJ, 152, 57.
- Dotter, A. 2016, ApJS, 222, 8.
- Eker, Z.,Bakış, V., Bilir, S., et al. 2018, MNRAS, 479, 5491.
- Jiang, L.-Q., Qian, S.-B., and Zhang, J. 2015, Research in Astronomy and Astrophysics, 15, 2237.
- Kjurkchieva, D.P., Dimitrov, D.P., Ibryamov, S.I., et al. 2018a, PASA, 35, e008.
- Kjurkchieva, D.P., Michel, R., Popov, V.A., et al. 2018b, New Astronomy, 62, 41.
- Koen, C., Koen, T., and Gray, R.O. 2016, AJ, 151, 168.
- Köse, O., Kalomeni, B., Keskin, V.,Ula¸s, B., and Yakut, K. 2011, Astron. Nachr., 332, 626.
- Latković, O., Čeki, A., and Lazarević, S. 2021, ApJS, 254, 10.
- Latković, O., and Čeki, A. 2021, PASJ, 73, 132.
- Liu, L., Chen, W.P., Qian, S.B., et al. 2015, AJ, 149, 111.
- Lohr, M.E., Norton, A.J., Gillen, E., et al. 2015, A&A, 578, 103.
- Lucy L.B. 1967, Zeitschritft für Astrophysik, 65, 89.
- Michel, R., Acerbi, F., Barani, C., and Martignoni, M. 2019, Revista Mexicana de Astronomia y Astrofisica, 55, 65.
- Norton, A.J., Payne, S.G., Evans, T., et al. 2011, A&A, 528, A90.
- Ruciński, S.M. 1969, Acta Astron., 19, 245.
- Sarotsakulchai, T., Qian, S.-B., Soonthornthum, B., et al. 2019, PASJ, 71, 81.
- von Zeipel H. 1924, MNRAS, 84, 665.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-67308f0e-2385-4b0c-8d00-a6fd85616064