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IUE monitoring of WR140 (WC7+O4-5)

Published online by Cambridge University Press:  07 August 2017

D.Y.A. Setia Gunawan ,
K.A. van der Hucht ,
P.M. Williams ,
L. Kaper ,
H. Henrichs  and
W. Wamsteker
D.Y.A. Setia Gunawan
Affiliation:
1 Space Research Organization Netherlands, Utrecht, The Netherlands
K.A. van der Hucht
Affiliation:
1 Space Research Organization Netherlands, Utrecht, The Netherlands
P.M. Williams
Affiliation:
2 Royal Observatories, Edinburgh, U.K.
L. Kaper
Affiliation:
3 University of Amsterdam, The Netherlands
H. Henrichs
Affiliation:
3 University of Amsterdam, The Netherlands
W. Wamsteker
Affiliation:
4 ESA IUE Observatory, Madrid, Spain

Abstract

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We present the first results of the IUE monitoring campaign of the WC7+O4-5 binary system WR140. Thirty-four high-resolution short-wavelength spectra were obtained in 1979—93, i.e., over more than one orbital period of 7.9 yr. The spectra show variations in the strong resonance lines of CIV and SiIV: large variations occur at the blue edges of the absorption parts of their P-Cygni profiles just after periastron passage. The observed profile changes are discussed in terms of a velocity variation at periastron passage and/or turbulence in the sightline to the O4—5 star at this time.

Keywords

stars: Wolf-Rayetbinariesultraviolet spectroscopyindividual: WR140
Type
Session VII - Hydrodynamics and high-energy physics of colliding winds
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 466 - 470
Copyright
Copyright © Kluwer 1995 

References

Conti, P.S. 1988, in: Conti, P.S. & Underhill, A.B. (eds.), Stars and Wolf-Rayet Stars, NASA SP-497 (Wahington: NASA), p. 121 Google Scholar
Eichler, D., Usov, V. 1993, ApJ 402, 271 Google Scholar
Giddings, J.R., Rees, P.C.T. 1989, SERC Starlink User Note 37.7 Google Scholar
van der Hucht, K.A., Williams, P.M., Spoelstra, T.A.Th., de Bruyn, A.G. 1992, in: Drissen, L., Leitherer, C. & Nota, A. (eds.), Non-isotropic and Variable Outflows from Stars, ASP Conf. Series 22, p. 253 Google Scholar
Kaper, L. 1993, Wind Variability in Early-Type Stars, PhD thesis, University of Amsterdam Google Scholar
Lamontagne, R., Moffat, A.F.J., Seggewiss, W. 1984, ApJ 271, 258 Google Scholar
Pollock, A.M.T. 1987, A&A 171, 135 Google Scholar
Smith, L.F. 1968, MNRAS 138, 109 Google Scholar
Torres, A.V., Conti, P.S., Massey, P. 1986, ApJ , 300, 379 Google Scholar
Williams, P.M. & Eenens, P.R.J. 1989, MNRAS 240, 445 Google Scholar
Williams, P.M., van der Hucht, K.A., van der Woerd, H., Wamsteker, W.M., Geballe, T.R., Garmany, C.D., Pollock, A.M.T. 1987, in: Lamers, H. & de Loore, C.W.H. (eds.), Instabilities in Luminous Early Type Stars (Dordrecht: Reidel), p. 221 Google Scholar
Williams, P.M., van der Hucht, K.A., Pollock, A.M.T., Florkowski, D.R., van der Woerd, H., Wamsteker, W.M. 1990, MNRAS 243, 662 (WHPFWW) Google Scholar