Photometric and polarimetric variability and mass-loss rate of the massive binary wolf-rayet star HDE 311884 (WN6 + O5: V)

Photometric and polarimetric monitoring of the Wolf-Rayet (W-R) + O-type binary system HDE 311884 = WR 47 over many orbital cycles shows the clear effects of phase-dependent electron scattering of O-star light as the orbiting O companion shines through varying column density of W-R stellar wind mate...

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Detalles Bibliográficos
Autores principales: Moffat, A.F.J., Drissen, L., Robert, C., Lamontagne, R., Coziol, R., Mousseau, N., Niemela, V.S., Cerruti, M.A., Seggewiss, W., Van Weeren, N.
Formato: JOUR
Materias:
Polarization
Stars: eclipsing binaries
Stars: individual (HDE 311884)
Stars: mass loss
Stars: Wolf-Rayet
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v350_n2_p767_Moffat
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Photometric and polarimetric monitoring of the Wolf-Rayet (W-R) + O-type binary system HDE 311884 = WR 47 over many orbital cycles shows the clear effects of phase-dependent electron scattering of O-star light as the orbiting O companion shines through varying column density of W-R stellar wind material. In contrast to this wind-type eclipse, the stars themselves do not quite eclipse. Both photometry and polarimetry give a consistent estimate of the mass-loss rate of the W-R component: Ṁ ≅ 3 × 10-5 M⊙ yr-1. The orbital inclination, i ≅ 70°, along with the previously published velocity orbit, yields high masses: M(WNo) ≅ 48 M⊙ and M(O5: V) ≅ 57 M⊙.

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