Detached binaries in the Large Magellanic Cloud. A selection of binaries suitable for distance determination

Abstract

As a result of a careful selection of eclipsing binaries in the Large Magellanic Cloud using the OGLE-II photometric database, we present a list of 98 systems that are suitable targets for spectroscopic observations that would lead to the accurate determination of the distance to the LMC. For these systems we derive preliminary parameters combining the OGLE-II data with the photometry of MACHO and EROS surveys. In the selected sample, 58 stars have eccentric orbits. Among these stars we found fourteen systems showing apsidal motion. The data do not cover the whole apsidal motion cycle, but follow-up observations will allow detailed studies of these interesting objects.

arXiv comment15 pages, 6 figures, accepted for publication in A&A

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• Artificial Intelligence Approach to the Determination of Physical Properties of Eclipsing Binaries. I. The EBAI Project
• Eclipsing binary stars in the Large and Small Magellanic Clouds from the MACHO project: The Sample
• Apsidal motion and light a curve solution for eighteen SMC eccentric eclipsing binaries
• Eclipsing binaries in the MACHO database: New periods and classifications for 3031 systems in the Large Magellanic Cloud
• The eclipsing LMC star OGLE05155332--6925581: a clue for Double Periodic Variables
• The Distance to the Massive Eclipsing Binary LMC-SC1-105 in the Large Magellanic Cloud
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• Apsidal motions of 90 eccentric binary systems in the Small Magellanic Cloud
• Apsidal motion and absolute parameters for five LMC eccentric eclipsing binaries
• Apsidal motion and a light curve solution for thirteen LMC eccentric eclipsing binaries
• Binaries with total eclipses in the LMC: potential targets for spectroscopy