Absolute Parameters for Eight Eclipsing Binaries in the Large Magellanic Cloud: The Mass‐Luminosity Relation

Abstract

A simultaneous light and radial velocity analysis of eight LargeMagellanic Cloud (LMC) eclipsing binaries is presented. Combiningspectroscopic observations obtained with UVES at the ESO Very LargeTelescope and light curves available from the MACHO and OGLE databases,accurate masses and radii for the binary components, along with theirspectral types and luminosities, are derived. These determinations allowus to construct the first mass-luminosity relation for late O and earlyB type stars in the LMC. This mass-luminosity relation looks verysimilar to that of the Milky Way, in spite of the differentmetallicities. The good agreement achieved in the comparison with recenttheoretical isochrones is encouraging regarding the reliability of starmodels up to 20 M_{solar}.Based on observations obtained at the European Southern Observatory,Paranal, with VLT UT2 (Kueyen); ESO programs 68.D-0328(A) and70.D-0191(A).