Article (Scientific journals)
Dust formation by the colliding wind WC5+O9 binary WR19 at periastron passage
Williams, P. M.; Rauw, Grégor; van der Hucht, K. A.
2009In Monthly Notices of the Royal Astronomical Society, 395, p. 2221-2225
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Keywords :
binaries: spectroscopic; circumstellar matter; stars: individual: WR19; stars: Wolf-Rayet; infrared: stars
Abstract :
[en] We present infrared photometry of the episodic dust-making Wolf-Rayet system WR19 (LS3), tracking its fading from a third observed dust formation episode in 2007 and strengthening the view that these episodes are periodic (P = 10.1 +/- 0.1y). Radial velocities (RVs) of the O9 component observed between 2001 and 2008 show RV variations consistent with WR19 being a spectroscopic binary of high eccentricity (e = 0.8), having periastron passage in 2007.14, shortly before the phase of dust formation. In this respect, WR19 resembles the archetypical episodic dust-making colliding wind binary system WR140. Based on observations collected at the European Southern Observatory, La Silla, Chile, in allocations 67.D-0043, 70.D-0266, 72.D-0070, 73.D-0027, 74.D-0116, 76.D-0029, 78.D-0001, 79.D-0092 and 80.D-0198. E-mail: pmw@roe.ac.uk
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Williams, P. M.;  Institute for Astronomy, Scottish Universities Physics Alliance, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ
Rauw, Grégor  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) - Sciences spatiales
van der Hucht, K. A.;  Space Research Organization Netherlands, Sorbonnelaan 2, NL-3584CA Utrecht, the Netherlands ; Astronomical Institute `Anton Pannekoek', University of Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, the Netherlands
Language :
English
Title :
Dust formation by the colliding wind WC5+O9 binary WR19 at periastron passage
Publication date :
01 June 2009
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
395
Pages :
2221-2225
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 July 2009

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