Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage

Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage

We present the results from the spectroscopic follow-up of WR140 (WC7 + O4-5) during its last periastron passage in january 2009. This object is known as the archetype of colliding wind binaries and has a relatively large period (≃8 years) and eccentricity (≃0.89). We provide updated values for the...

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Veröffentlicht in:Proceedings of the International Astronomical Union 2010-07, Vol.6 (S272), p.501-502
Hauptverfasser: Fahed, Rémi, Moffat, Anthony F. J., Zorec, Juan, Eversberg, Thomas, Chené, André-Nicolas, Alves, Filipe, Arnold, Wolfgang, Bergmann, Thomas, Carreira, Luis F. Gouveia, Dias, Filipe Marques, Fernando, Alberto, Gallego, José Sánchez, Hunger, Thomas, Knapen, Johan H., Leadbeater, Robin, Morel, Thierry, Rauw, Grégor, Reinecke, Norbert, Ribeiro, José, Romeo, Nando, dos Santos, Eva M., Schanne, Lothar, Stahl, Otmar, Stober, Barbara, Stober, Berthold, Viegas, Nelson G. Correia, Vollmann, Klaus, Corcoran, Michael F., Dougherty, Sean M., Pittard, Julian M., Pollock, Andy M. T., Williams, Peredur M.
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Astrophysics
Contributed Papers
Double stars
Spectrum analysis
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Zusammenfassung:We present the results from the spectroscopic follow-up of WR140 (WC7 + O4-5) during its last periastron passage in january 2009. This object is known as the archetype of colliding wind binaries and has a relatively large period (≃8 years) and eccentricity (≃0.89). We provide updated values for the orbital parameters, new estimates for the WR and O star masses and new constraints on the mass-loss rates.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921311011173