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Title:
The WR 140 periastron passage 2009: first results from MONS and other optical sources
Authors:
Fahed, R.; Moffat, A. F. J.; Zorec, J.; Eversberg, T.; Chené, A. N.; Alves, F.; Arnold, W.; Bergmann, T.; Gouveia Carreira, L. F.; Marques Dias, F.; Fernando, A.; Sanchez Gallego, J.; Hunger, T.; Knapen, J. H.; Leadbeater, R.; Morel, T.; Rauw, G.; Reinecke, N.; Ribeiro, J.; Romeo, N.; dos Santos, E. M.; Schanne, L.; Stahl, O.; Stober, Ba.; Stober, Be.; Correia Viegas, N. G.; Vollmann, K.; Corcoran, M. F.; Dougherty, S. M.; Pittard, J. M.; Pollock, A. M. T.; Williams, P. M.
Publication:
eprint arXiv:1101.1430
Publication Date:
01/2011
Origin:
ARXIV
Keywords:
Astrophysics - Solar and Stellar Astrophysics
Comment:
5 pages, 5 figures, Published in proceedings of "Stellar Winds in Interaction", editors T. Eversberg and J.H. Knapen. Full proceedings volume is available on http://www.stsci.de/pdf/arrabida.pdf
Bibliographic Code:
2011arXiv1101.1430F

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.
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arXiv e-prints