Spectroscopy of the archetype colliding-wind binary WR 140 during the 2009 January periastron passage

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DOIResolve DOI: http://doi.org/10.1111/j.1365-2966.2011.19035.x
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TypeArticle
Journal titleMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
Volume418
Issue1
Pages213; # of pages: 12
Subjectbinaries: general; stars: fundamental parameters; stars: winds, outflows; stars: Wolf-Rayet
AbstractWe present the results from the spectroscopic monitoring of WR 140 (WC7pd + O5.5fc) during its latest periastron passage in 2009 January. The observational campaign consisted of a constructive collaboration between amateur and professional astronomers. It took place at six locations, including Teide Observatory, Observatoire de Haute Provence, Dominion Astrophysical Observatory and Observatoire du Mont Megantic. WR 140 is known as the archetype of colliding-wind binaries and it has a relatively long period (⋍8 yr) and high eccentricity (⋍0.9). 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 and colliding-wind geometry.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Herzberg Institute of Astrophysics
Peer reviewedYes
NPARC number19688677
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Record identifier9b222da1-770d-487e-804e-ea15864091c3
Record created2012-03-19
Record modified2016-05-09
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