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The radial velocity variations of WR46 (WN3p)

Published online by Cambridge University Press:  07 August 2017

V.S. Niemela ,
R.H. Barbá  and
M.M. Shara
V.S. Niemela
Affiliation:
1 Institute de Astronomía y Física del Espacio, Buenos Aires, Argentina
R.H. Barbá
Affiliation:
2 Observatorio Astronómico, Universidad National de La Plata, Argentina
M.M. Shara
Affiliation:
3 Space Telescope Science Institute, Baltimore, USA

Abstract

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Spectral observations of the WN3p star WR46 (HD 104994) obtained during June 1993 and January/February 1994 display large amplitude radial velocity variations of the strong emission lines Nv 4603-19Å and HeII 4686A, on a time scale of a fraction of a day. The most probable period found is 0.311 d, similar to the photometric period found by previous authors. The amplitude of the radial velocity variations of Nv emission is almost twice that of HeII. Noting the similarity of WR46 with low mass X-ray binaries, we suggest that the emission line spectrum corresponds to that of a luminous accretion disk in an evolved binary system.

Keywords

stars: Wolf-Rayetbinariesaccretion diskindividual: WR46
Type
Session IV - poster summaries
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 245 - 247
Copyright
Copyright © Kluwer 1995 

References

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