Stellar wind

A stellar wind is a flow of gas ejected from the upper atmosphere of a star. It is distinguished from the bipolar outflows characteristic of young stars by being less collimated, although stellar winds are not generally spherically symmetric.

Different types of stars have different types of stellar winds.

Post-main-sequence stars nearing the ends of their lives often eject large quantities of mass in massive ( \scriptstyle \dot{M} > 10^{-3} solar masses per year), slow (v = 10 km/s) winds. These include red giants and supergiants, and asymptotic giant branch stars. These winds are understood to be driven by radiation pressure on dust condensing in the upper atmosphere of the stars.

Massive stars of types O and B have stellar winds with lower mass loss rates (\scriptstyle \dot{M} < 10^{-6} solar masses per year) but very high velocities (v > 1–2000 km/s). Such winds are driven by radiation pressure on the resonance absorption lines of heavy elements such as carbon and nitrogen. These high-energy stellar winds blow stellar wind bubbles.

Latest News for: Stellar wind

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‘Get in loser, we're going stargazing’: NASA uses Mean Girls reference while sharing pic of Cigar galaxy

Hindustan Times 15 Jan 2021
"The galaxy located in the constellation Ursa Major is remarkable,” states a bit of the caption shared alongside the post ... The text further states, "Stellar winds streaming from hot new stars form a galactic super wind that blasts out plumes of hot gas (red) and a huge halo of smoky dust (yellow/orange) perpendicular to the narrow galaxy (white)"....
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Winners and losers: Alabama also has a pretty good basketball team; Bob Huggins has issues ...

CBS Sports 10 Jan 2021
Winner. Texas' Andrew Jones hits big shot ... Andrew Jones hits a CLUTCH 3! ... This team will wind up being fine - its guards remain stellar and Derek Culver is having a career year - but it's possible Huggins miscalculated how important Tshiebwe was to this team as a defender and rebounder, and we're seeing that play out in real time over the last week ... ....
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College basketball scores, winners and losers: Alabama keeps rolling; Bob Huggins has issues in West Virginia

CBS Sports 10 Jan 2021
Winner. Texas' Andrew Jones hits big shot ... Andrew Jones hits a CLUTCH 3! ... This team will wind up being fine - its guards remain stellar and Derek Culver is having a career year - but it's possible Huggins miscalculated how important Tshiebwe was to this team as a defender and rebounder, and we're seeing that play out in real time over the last week ... ....
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Supergiant eclipsing binary IGR J18027–2016 investigated in detail

Phys Dot Org 06 Jan 2021
In such systems, accretion can be driven by a powerful supergiant stellar wind ... Previous studies suggested that stellar wind clumps may be responsible for the short- and long-term variability and spectral behavior of IGR J18027–2016 ... Stellar wind structures in the eclipsing binary system IGR J18027–2016, arXiv.2012.14460 arxiv.org/abs/2012.14460....
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Study of nebula IRAS 00500+6713 suggests its central star is unlike any seen before

Phys Dot Org 06 Jan 2021
Nebulas are clouds of dust and gas in certain regions in space—many of them can be seen with the naked eye in the night sky ... In this new effort, the researchers were studying the nebula IRAS 00500+6713 because last year, another team of researchers had discovered a central star, called J005311, with a stellar wind of unusually high speeds ... Lidia M....
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Veteran Vols insist they have the makeup to bounce back from Alabama loss

Times Free Press 04 Jan 2021
During the 2018-19 basketball season, Tennessee won 23 of its first 24 games and spent a program-record four consecutive weeks at No. 1 in the Associated Press poll ... Will that defeat wind up serving as a needed jolt for another stellar season, or will it be the first of several indications that this is a solid squad but nothing special? ... 7 to No ... ....
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Black hole X-ray binary GRS 1915+105 has a variable magnetic disc wind, study suggests

Phys Dot Org 23 Dec 2020
They report that the source exhibits a variable magnetic accretion disc wind ... Black hole X-ray binaries (BHXBs) are binary systems consisting of a black hole orbited by a stellar companion, typically a low-mass, evolved star ... Continuous infrared winds discovered during the eruption of a stellar mass black hole....
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Robust stellar flares might not prevent life on exoplanets, could facilitate its detection

Phys Dot Org 21 Dec 2020
Emitted by stars, stellar flares are sudden flashes of magnetic imagery ... On the flip side, M and K dwarf stars are thought to have more frequent flaring activity than our sun, and their tidally locked planets are unlikely to have magnetic fields helping deflect their stellar winds."....
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The First Radio Signal From An Exoplanet May Have Just Been Detected

IFL Science 18 Dec 2020
“We make the case for an emission by the planet itself ... Turner said in a statement ... If so, it indicates a very strong magnetic field being bombarded by Tau Boötis A's strong stellar wind ... However, the Earth's magnetic field is very important for life on Earth, having enabled our planet to hold onto its atmosphere by shielding against the solar wind ... -....
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Stocking stuffers: Five film camera bargains

Digital Photography Review 18 Dec 2020
While the FE shoots with almost no perceptible vibration and its winder moves the smoothest clockwork, the FG shakes like a hiccupping elephant and winds with all the precision of a 99-cent water pistol ... Thanks to its less-than-stellar (and I think mostly undeserved) reputation, there is no better bargain among manual-wind Nikons....
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Something out there? Scientists may have detected radio emissions from a distant exoplanet for the ...

Russia Today 17 Dec 2020
In the case of Tau Bootis, the stellar wind, charged particles emitted by its binary pair, clanged off the planet's magnetic field, causing major “bursty” shifts in radio emissions ... solar wind and cosmic rays, and protecting the planet from atmospheric loss.”....
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DOOM Eternal – New BattleMode Maps, Invasion Mode Planned for 2021

GamingBolt 16 Dec 2020
The year is winding down for everyone and the games industry is no exception. Id Software, which released the stellar DOOM Eternal earlier this year, released an end of year letter for its community, thanking them for their support ... The studio also outlined its plans for next year ... ....
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How to watch I'm Your Woman \u2013 a crime thriller definitely worth your time

Digital Spy 11 Dec 2020
Let's begin with stating the obvious ... The how of it is what unfurls with the film ... The why Cal, Jean, and Teri all wound up together is almost the bigger question than the how did Jean wind up in this position, but I'm Your Woman answers both with crackling intensity, sharp dialogue, and stellar acting. You'll want to watch it again ... .......
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