Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-27T05:14:51.022Z Has data issue: false hasContentIssue false
  • English
  • Français

Revised Wolf-Rayet binary orbits and new binaries

Published online by Cambridge University Press:  07 August 2017

V.S. Niemela
V.S. Niemela*
Affiliation:
Instituto de Astronomía y Física del Espacio, Buenos Aires, Argentina

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Revised orbits are presented for the double-lined binary WR+O systems HD 63099 (WR9) and HDE 320102 (WR97). The orbit derived for WR9 from OVI emission and HeII absorptions is considerably different from that previously published based on the CIVΛ4658 emission line velocities. WR97 is found to have a period of 12.6 days and small minimum masses, probably due to a low orbital inclination. Two stars in our Galaxy, WR30a and WR70, and two in the Magellanic Clouds, Brey44 and AB7, show radial velocity variations of emission and absorption lines in opposite sense. Although no periods are yet available, preliminary values of the mass ratios can be estimated from the velocity variations.

Keywords

stars: binariesstars: Wolf-Rayet
Type
Session IV - Properties of Wolf-Rayet binaries
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 223 - 230
Copyright
Copyright © Kluwer 1995 

References

Moffat, A.F.J., Breysacher, J., Seggewiss, W. 1985 ApJ 292, 511 CrossRefGoogle Scholar
Moffat, A.F.J. 1988 ApJ 330, 766 Google Scholar
Niemela, V.S., Massey, P., Conti, P.S. 1984 PASP 96 549 Google Scholar
Pakull, M. 1991, in: van der Hucht, K.A. & Hidayat, B. (eds.), Wolf-Rayet Stars and Interrelations with Other Massive stars in Galaxies, Proc. IAU Symp. No. 143 (Dordrecht: Kluwer), p.391 Google Scholar
Smith, L.F. 1967, PASP 79, 347 Google Scholar
Williams, P.M., van der Hucht, K.A., The, P.S., Bouchet, P., Roberts, G. 1991, in: van der Hucht, K.A. & Hidayat, B. (eds.), Wolf-Rayet Stars and Interrelations with Other Massive stars in Galaxies, Proc. IAU Symp. No. 143 (Dordrecht: Kluwer), p. 417 Google Scholar
Niemela, V.S. et al. 1994, in preparation Google Scholar