Detached binaries in the Large Magellanic Cloud

Free access article

Issue		A&A Volume 434, Number 1, April IV 2005


Page(s)		89 - 99
Section		Extragalactic astronomy
DOI		http://dx.doi.org/10.1051/0004-6361:20042343

A&A 434, 89-99 (2005)
DOI: 10.1051/0004-6361:20042343

A selection of binaries suitable for distance determination

G. Michalska and A. Pigulski

Instytut Astronomiczny Uniwersytetu Wroclawskiego, Kopernika 11, 51-622 Wroclaw, Poland
e-mail: [michalska;pigulski]@astro.uni.wroc.pl

(Received 9 November 2004 / Accepted 3 December 2004 )

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.

Key words: stars: binaries: eclipsing -- Magellanic Clouds -- stars: fundamental parameters

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