VLBA Observations of Colliding Winds in the Wolf-Rayet Binary WR140

Details VLBA Observations of Colliding Winds in the Wolf-Rayet Binary WR140 VLBA Observations of Colliding Winds in the Wolf-Rayet Binary WR140

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.5003b&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #50.03; Bulletin of the American Astronomical Society, Vol. 31, p.896

Astronomy and Astrophysics

Astronomy

Scientific paper

We present Very Long Baseline Array images of nonthermal microwave emission originating from shock-heated plasma in the wind collision region between the two components (WC7 + O4-5) of the Wolf-Rayet binary system WR140. An extended bow-shock structure is seen at higher frequencies, consistent with a model incorporating electron acceleration in a shock region moving through the stellar wind of the WR star. During 1999-2001 WR140 is approaching periastron, and we plan VLBA high-resolution multi-wavelength monitoring of the position and structure of the shock region.

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