IALP 13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Properties of massive stars in Galactic binary systems
Autor/es:
SABÍN-SANJULIÁN, C.; ARIAS, J. I.; GAMEN, R; BARBA, R
Lugar:
La Serena
Reunión:
Congreso; Reunión Binacional AAA-SOCHIAS; 2018
Institución organizadora:
SOCHIAS - Universidad de La Serena
Resumen:
Within the OWN project, we use high resolution spectroscopic data of the massive binary system HD54662 to measure accurate radial velocities and disentangle the spectra of the two components, which we classify as O6.5Vz(n) and O7.5Vz. We obtain a new spectroscopic orbital solution of the system, with a period of P=5.500.02yr. We use published astrometric data to derive absolute stellar masses of 241 and 201M for components A and B, respectively. We analyze quantitatively the disentangled spectra using fastwind stellar atmosphere models and infer current evolutionary masses using the bonnsai tool. We find too high evolutionary masses, which could be related to the mass discrepancy problem.
