The Massive ZAMS O-type binary system FO15 in the Carina Nebula.

E. FERNÁNDEZ LAJÚS; V. NIEMELA.

Praga, Rep. Checa.

Jornada; Calibrating the Top of the Stellar M-L Relation, 26th meeting of the IAU, Joint Discussion 5; 2006

International Astronomical Union

We present a high precision light curve for the massive eclipsing binary system FO15, located in an optically obscured area in the Carina Nebula, where ongoing star formation is observed. Using previously published radial velocity data, the light curve is analyzed using the Wilson-Devinney code. We find that the physical parameters of the components of the FO15 binary system correspond to stars which have just arrived to the ZAMS, i.e. smaller radii and lower luminosities than "normal" galactic O-type stars.