Polarimetric determination of the inclination of the Wolf-Rayet binary system HD 152270

Details Polarimetric determination of the inclination of the Wolf-Rayet binary system HD 152270 Polarimetric determination of the inclination of the Wolf-Rayet binary system HD 152270

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..695l&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, Aug. 1982, p. 695-699. Research supported by the Comision de Investi

Astronomy and Astrophysics

Astronomy

18

Binary Stars, Carbon Stars, Polarimetry, Wolf-Rayet Stars, Electron Scattering, O Stars, Stellar Envelopes, Stellar Models, Ubv Spectra

Scientific paper

UBV polarimetric observations have been obtained for the star, HD 152270, a bright WC7 + O5 spectroscopic binary system. The observations show a phase-locked variation of high amplitude which is explained by the model of electron scattering in a dense co-rotating envelope. The observations permit us to determine a value of 35° for the inclination of the orbital plane. The masses of the components of the system are then obtained: 11 Msun for the WC7 component and 25 Msun for the O5 star. A brief discussion about departures from the model assumptions is also presented.

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