A second JWST epoch of WR 140 shows its dust shells expanding at nearly constant speeds near the stellar wind speed, with clumpy substructures persisting for over a year.
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abstract
Observations in the infrared have played a significant role in the development of our understanding of WR140. Two sets of observations are described here: the changing profile of the 1.083-{\mu}m He I line observed for the 2009 campaign to study evolution of the wind-collision region near periastron passage, and multiwavelength photometry and imaging of the dust made by WR140 in previous periastron passages.
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Dynamic Imprints of Colliding-wind Dust Formation from WR140
A second JWST epoch of WR 140 shows its dust shells expanding at nearly constant speeds near the stellar wind speed, with clumpy substructures persisting for over a year.