Absolute parameters of five eclipsing binaries in the LMC

GONZÁLEZ, J. F.; VERAMENDI, M. E.; OSTROV, P.; MORRELL, N.; MINNITI, D.

Brno, República Checa

Conferencia; Binaries - key to the comprenhension of the Universe; 2009

Masaryk Uviversity, Astronomical Institute of Praga, Academy of Science Czech Republic, Slovak Academy of Science

We present a simultaneous spectroscopic-photometric analysis of five eclipsing binaries in the LMC. We determine absolute stellar parameters using spectroscopic observations obtained with VLT+UVES and MagellanII+MIKE, and photometric data from the MACHO and OGLE databases. The object MACHO82.9010.36 is a spectroscopic triple system. The binaries 78.6708.115 and 82.9130.25 are eccentric systems showing apsidal motion due to tidal forces. The apsidal motion rate is used to obtain information about the internal mass distribution of these stars.