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Photometry of Eclipsing Binary Stars in the Large and Small Magellanic Clouds

  • G.P. Bayne (a1), W. Tobin (a1), J.D. Pritchard (a2), I. Bond (a3), K.R. Pollard (a1), S.C. Besier (a1), S. Noda (a4), T. Sumi (a4), T. Yanagisawa (a4), M. Sekiguchi (a5), M. Honda (a5), Y. Muraki (a4), M. Takeuti (a6), J.B. Hearnshaw (a1), P.M. Kilmartin (a1), R.J. Dodd (a7), D.J. Sullivan (a8) and P.C.M. Yock (a9)...

Abstract

The light curves for three eclipsing binaries in the Magellanic Clouds have been obtained using CCD uVJIC photometry. One target in the LMC, MACHO*05:36:48.7−69:17:00, is an eccentric system, e = 0.20, with a period of 3.853534 ± 0.000005 d. Initial solutions indicate a primary component in the range T eff,1 = 20,000−35,000K and the secondary T eff,2 1000−2000K cooler than the primary, with inclinations ranging i = 84.2° − 86.0°. Two targets in the SMC, MOA J005018.4-723855 and MOA J005623.5−722123, have periods of 1.8399±0.0004 and 2.3199 ± 0.0003 days respectively. Both have circular orbits with the former being a semi-detached system.

Resumen

Se han obtenido curvas de luz para tres binarias eclipsantes en las Nubes de Magallanes mediante fotometría CCD uVJIC . Uno de los objetos en la GNM, MACHO*05:36:48.7−69:17:00, es un sistema excéntrico, con e = 0.20 y un período de 3.853534 ± 0.000005 d. Las soluciones iniciales indican una primaria con temperatura en el intervalo Teff,1 = 20,000−35,000K, y una secundaria con una Teff,2 1000-2000K más fría que la primaria, con inclinaciones entre i = 84.2° – 86.0°. Dos objetos en la PNM, MOA J005018.4–723855 and MOA J005623.5–722123, tienen períodos de 1.8399 ± 0.0004 y 2.3199 ± 0.0003 días, respectivamente. Ambos tienen órbitas circulares, y el primero es un sistema semi-separado.

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References

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