The presence of warm dust implies that it formed very recently, perhaps in spurts, as chemically enriched material from the two stellar winds
collides at different points, mixes, flows away, and cools.
Binney: Stellar Wind
was the basic reason I left the NSA in 2001.
It was already known that the stellar wind
is "clumpy", but the Herschel results have shown that some regions around the star must have no wind.
Observations taken with Hubble's Cosmic Origins Spectrograph (COS) suggest powerful stellar winds
are sweeping the cast-off atmospheric material behind the scorched planet and shaping it into a comet-like tail.
Normally, this much dust would block our view of the star, so the current brightening is either due to something destroying the dust, or the stellar wind
not producing as much dust as it did before.
Scientists have thought a dense stellar wind
fueled the outburst and considered it the prototype for "supernova impostors," or shorter-lived eruptions that don't quite destroy a star.
The radiation on the cloud creates high pressure at the surface by ablation and ram pressure from the stellar wind
This study also revealed that the black hole in M101 ULX-1 can capture more material from that stellar wind
than astronomers had anticipated.
Planetary magnetospheres are 'bubbles' made of fields and plasma created by the shock between the stellar wind
and the intrinsic magnetic field of the planet.
Eta Carinae is too cool to generate X-rays, but it continuously blasts a flow of gas into space as a stellar wind
at about 300 miles per second.
These are huge condensations of molecular gas--the head of each containing more mass than the Earth--embedded in the ionised nebula and driven outwards by the stellar wind
from the evolving central star.
From the energy and duration of the initial X-ray release, the researchers suggest that the exploded star was compact but surrounded by a substantial stellar wind
, hurled out before it went supernova.