High-resolution radio observations of the colliding-wind binary WR 140

@article{Dougherty2005HighresolutionRO,
  title={High-resolution radio observations of the colliding-wind binary WR 140},
  author={S. Dougherty and A. Beasley and M. Claussen and B. Zauderer and N. Bolingbroke},
  journal={The Astrophysical Journal},
  year={2005},
  volume={623},
  pages={447-459}
}
Milliarcsecond resolution Very Long Baseline Array (VLBA) observations of the archetype W-R+O star colliding-wind binary (CWB) system WR 140 are presented for 23 epochs between orbital phases 0.74 and 0.97. At 8.4 GHz, the emission in the wind-collision region (WCR) is clearly resolved as a bow-shaped arc that rotates as the orbit progresses. We interpret this rotation as due to the O star moving from southeast to approximately east of the W-R star, which leads to solutions for the orbital… Expand
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The eccentric W-R + O binary system WR 140 produces dust for a few months at intervals of 7.94 yr coincident with periastron passage. We present the first resolved images of this dust shell, atExpand
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