Abstract
Photometric solutions of four new discovered W UMa-type binaries were carried out for the first time by using the 2003 version of the W-D program. It is discovered that all of the four systems are over-contact binaries. Two binaries, GSC 0804-0118 and GSC 2936-0478, are of A-subtype, while two other binaries, GSC 1848-1264 and GSC 0619-0232, are of W-subtype. From our solutions, the fundamental orbital and physical parameters were determined. For GSC 0619-0232 and GSC 2936-0478, the asymmetries of the light curves (i.e., the O'Connell effect) were explained by the presence of dark spots on the more massive components. Our photometric results reveal that GSC 0619-0232 is an important and interesting system. It is a W-type over-contact binary with a low mass ratio of q = 0.100 and a high over-contact degree of f = 93.4%, which suggests that GSC 0619-0232 may be evolved into a single rapid-rotating star.
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References
Al-Naimity, H.M.: 1978, Ap&SS 53, 181.
González-Rojas, D., et al.: 2003, IBVS, 5437.
Menke, J.L.: 2004, http://www.konkoly.hu/cgi-bin/IBVS?5600.
Koff, R.A: 2004, http://www.konkoly.hu/cgi-bin/IBVS?5500.
Kurucz, R.L.: 1993, in: E.F. Milone (ed.), Light Curve Modeling of Eclipsing Binary Stars, Springer-Verlag, New York, p. 93.
Lucy, L.B.: 1967, Z. Astrophys. 65, 89.
Nelson, R.H., et al.: 2002, IBVS, 5285.
Pribulla, T., et al.: 1999, A&A 345, 137.
Pribulla, T. and Vanko, M.: 2002, CoSka 32, 79.
Qian, S.: 2003, MNRAS 342, 1260.
Qian, S. and Yang, Y.: 2004, AJ 128, 2430.
Qian, S. and Yang, Y.: 2005, MNRAS 356, 765.
Rasio, F.A. and Shapiro, S.L.: 1995, ApJ 438, 887.
Rucinski, S.M.: 1973, Acta Astron. 23, 79.
Wilson, R.E. and Devinney, E.J.: 1971, ApJ 166, 605.
Wilson, R.E.: 1990, ApJ 356, 613.
Wilson, R.E.: 1994, PASP 106, 921.
Wilson, R.E. and Van Hamme, W.: 2003, Computing Binary Star Observables.
Xiang, F. and Zhou, Y.: 2004, NewA 9, 273.
Yang, Y. and Liu, Q.: 2002, AJ 124, 3358.
Yang, Y., Liu, Q. and Leung, K.-C.: 2001, A&A 370, 507.
Yang, Y., Qian, S. and Koppelman M.D.: 2005, ChjAA 5(2).
Zola, S., Kolonko, M. and Szczech, M.: 1997, A&A 324, 1010.
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Yang, Y.G., Qian, S.B., Gonzalez-rojas, D.J. et al. The First Photometric Analyses Of Four New Discovered Ew-Type Eclipsing Binaries: GSC 1848-1264, GSC 0804-0118, GSC 0619-0232 And GSC 2936-0478. Astrophys Space Sci 300, 337–356 (2005). https://doi.org/10.1007/s10509-005-4161-4
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DOI: https://doi.org/10.1007/s10509-005-4161-4