Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage

Rémi Fahed; Anthony F.J. Moffat; Juan Zorec; Thomas Eversberg; André Nicolas Chené; Filipe Alves; Wolfgang Arnold; Thomas Bergmann; Luis F.Gouveia Carreira; Filipe Marques Dias; Alberto Fernando; José Sánchez Gallego; Thomas Hunger; Johan H. Knapen; Robin Leadbeater; Thierry Morel; Grégor Rauw; Norbert Reinecke; José Ribeiro; Nando Romeo; Eva M. Dos Santos; Lothar Schanne; Otmar Stahl; Barbara Stober; Berthold Stober; Nelson G.Correia Viegas; Klaus Vollmann; Michael F. Corcoran; Sean M. Dougherty; Julian M. Pittard; Andy M.T. Pollock; Peredur M. Williams

Conference ProceedingsOPEN ACCESS

Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage

Proceedings of the International Astronomical Union (2011) 6(S272) 501-502

DOI: 10.1017/S1743921311011173

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Abstract

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. © International Astronomical Union 2011.

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Fahed, R., Moffat, A. F. J., Zorec, J., Eversberg, T., Chené, A. N., Alves, F., … Williams, P. M. (2011). Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage. In Proceedings of the International Astronomical Union (Vol. 6, pp. 501–502). Cambridge University Press. https://doi.org/10.1017/S1743921311011173

Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage

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