CCD photometry of variable stars in the Magellanic Clouds - VII. The eclipsing binaries MACHO*05:36:48.7-69:17:00 in the LMC, and MOA J005018.4-723855 and J005623.5-722123 in the SMC

Details CCD photometry of variable stars in the Magellanic Clouds - VII. The eclipsing binaries MACHO*05:36:48.7-69:17:00 in the LMC, and MOA J005018.4-723855 and J005623.5-722123 in the SMC CCD photometry of variable stars in the Magellanic Clouds - VII. The eclipsing binaries MACHO*05:36:48.7-69:17:00 in the LMC, and MOA J005018.4-723855 and J005623.5-722123 in the SMC

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.349..833b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 349, Issue 3, pp. 833-840.

Astronomy and Astrophysics

Astronomy

3

Binaries: Eclipsing, Stars: Fundamental Parameters, Stars: Individual: Macho*05:36:487-69:17:00, Stars: Individual: Moa J0050184-723855, Stars: Individual: Moa J0056235-722123, Magellanic Clouds

Scientific paper

Using improved techniques, we have obtained CCD uVJIC photometry for three eclipsing binary stars in the Magellanic Clouds and made preliminary analyses of the light curves. MACHO*05:36:48.7-69:17:00 in the Large Magellanic Cloud (LMC) is a detached, eccentric system. Apsidal motion is detected with a period of 100 +/- 5 yr. The radii of the component stars are less than a fifth of their orbital separation and their masses are plausibly ~14 and ~20 Msolar. Similar masses may also characterize the components of MOA J005018.4-723855 in the Small Magellanic Cloud (SMC), but here the more massive star is cooler, fills its Roche lobe, and is probably in an early stage of case A mass transfer. MOA J005623.5-722123 in the SMC is detached with a nearly edge-on orbit. The masses are plausibly ~14 and ~16 Msolar. Because of polar gravity brightening, the star occulted at the shallower eclipse may actually have the higher mean effective temperature by a marginal amount.

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