SIMBAD references

1994A&A...291..805W - Astronomy and Astrophysics, volume 291, 805-810 (1994/11-3)

Multi-frequency variations of the Wolf-Rayet system HD 193793. II. Observations of the 1991-92 radio maximum.

WILLIAMS P.M., VAN DER HUCHT K.A. and SPOELSTRA T.A.T.

Abstract (from CDS):

New observations of the colliding wind Wolf-Rayet WC7+O4-5 binary HD 193793 (WR 140) at 6cm and 21cm with the Westerbork Synthesis Radio Telescope are presented. They show that the 21cm flux, in particular, rose to a sharp maximum in 1992, lagging about a year behind the 6cm flux. After maximum, both fell simultaneously. The data are interpreted in terms of the varying circumstellar extinction to a non-thermal source where the WC and O winds collide. The rising branch of the flux curve is determined mostly by extinction in the WC stellar wind and the fading branch mostly by that in the O star wind.

Abstract Copyright:

Journal keyword(s): radio continuum: stars - stars: Wolf-Rayet - stars: individual: HD 193793 - binaries: spectroscopic

Status at CDS:  

Simbad objects: 1

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