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

Published online by Cambridge University Press:  22 February 2018

G.P. Bayne ,
W. Tobin ,
J.D. Pritchard ,
I. Bond ,
K.R. Pollard ,
S.C. Besier ,
S. Noda ,
T. Sumi ,
T. Yanagisawa  and
M. Sekiguchi
...Show all authors
G.P. Bayne
Affiliation:
Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
W. Tobin
Affiliation:
Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
J.D. Pritchard
Affiliation:
European Southern Observatory, Santiago, Chile
I. Bond
Affiliation:
Royal Observatory, Edinburgh, UK
K.R. Pollard
Affiliation:
Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
S.C. Besier
Affiliation:
Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
S. Noda
Affiliation:
Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya
T. Sumi
Affiliation:
Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya
T. Yanagisawa
Affiliation:
Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya
M. Sekiguchi
Affiliation:
Institute of Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo, Japan
M. Honda
Affiliation:
Institute of Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo, Japan
Y. Muraki
Affiliation:
Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya
M. Takeuti
Affiliation:
Tohoku University Astronomical Institute, Sendai, Japan
J.B. Hearnshaw
Affiliation:
Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
P.M. Kilmartin
Affiliation:
Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
R.J. Dodd
Affiliation:
Carter National Observatory, Wellington, New Zealand
D.J. Sullivan
Affiliation:
School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
P.C.M. Yock
Affiliation:
Science Faculty, University of Auckland, Auckland, New Zealand

Abstract

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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 Teff,1 = 20,000−35,000K and the secondary Teff,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

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.

Keywords

BinariesEclipsing — StarsEarly-Type—StarsFundamental Parameters—StarsIndividual (Macho*05:36:48.7−69:17:00, MOA J005018.4−723855, MOA J005623.5−722123)
Type
Observational Results for Very Young Binaries
Information
International Astronomical Union Colloquium , Volume 191: The Environment and Evolution of Double and Multiple Stars , August 2004 , pp. 116 - 120
Copyright
Copyright © Instituto de Astronomia – Mexico 2004

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