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


Young star clusters know when it’s time to stop growing

Popular Science 30 Nov 2022
A new composite image from NASA and the European Space Agency (ESA) illustrates how the youngest members of a Milky Way cluster can exert “self control” in a process known as “stellar feedback.” ... The pressure and plasma coming out of the hotspots are called “stellar winds,” and act similar to a galactic power washer....

Harrington, McGinley and the World Cup victory that changed the face of Irish golf

The Irish Times 26 Nov 2022
Photograph. Andrew Redington/Allsport Denis Walsh. Sat Nov 26 2022 - 06.00 ... “They weren’t the marquee names of the 43rd World Cup of Golf,” began the final day report on the Associated Press newswire “nor were they the flashiest players,” winding up to a glorious “But”. That week Harrington and McGinley flattened a stellar field, like skittles ... ....

Who should be the Lubbock Avalanche-Journal's Athlete of the Week?

Lubbock Avalanche-Journal 21 Nov 2022
Fall sports are winding down while the winter season is heating up as athletes from football, volleyball and basketball turned in stellar performances last week and are are among the finalists for Lone Star Varsity Athlete of the Week ... Please include. name, grade, pertinent stats and use the subject head ... Female athletes ... .......

Snapshot: King of Monsters takes shape in the Cone Nebula

Astronomy 18 Nov 2022
This dramatic image of a mammoth celestial body was captured to help celebrate the ESO's 60th anniversary. RELATED TOPICS. EXOTIC OBJECTS ... Newborn blue stars within these clouds emit powerful stellar winds and radiation, which carve out local voids. Gas compresses near the edges of these voids, forming mighty pillars like the Cone ... JOIN THE DISCUSSION ... ....

Hornets fall to Smithville in bi-district playoffs

Gatesville Messenger 16 Nov 2022
The conditions at Hutto Memorial Stadium Friday were less-than-stellar as frigid temperatures and strong winds contributed to an uncharacteristically sloppy game from the Hornets ... The loss marked the end of the careers for members of a stellar senior GHS class who were freshman ......

Colliding magnetic fields reveal unknown planets

Phys Dot Org 15 Nov 2022
candidate astronomer Rob Kavanagh has developed mathematical models to better understand the interactions between exoplanets and stellar winds and to define features of exoplanets ... They are sometimes difficult to detect, but now it appears that interactions between exoplanets and stellar winds produce signals that radio telescopes can detect....

Team analyzes interactions between black hole-dominated galactic nucleus and surrounding star-forming regions

Phys Dot Org 14 Nov 2022
By compressing the gas into molecular form, it can foster the birth of new stars, or excessively strong feedback processes from the galactic wind can prevent birth by destroying stellar nurseries ... "We see definitive signs of the black hole-driven winds dumping energy out into the interstellar medium."....

See the dark pillar of the Cone Nebula captured by the Very Large Telescope

Digital Trends 12 Nov 2022
A stunning image of a distant nebula has been taken using the Very Large Telescope ... The Cone Nebula is next to the beautiful , also known as NGC 2264 ... ESO ... “This type of pillar arises when massive, newly formed bright blue stars give off stellar winds and intense ultraviolet radiation that blow away the material from their vicinity....

Science. A new ‘wild’ view of the Conic Nebula

The Cleveland American 11 Nov 2022
by Europe Press. November 11, 2022 at 06.15 am. Madrid 11 (European press) ... Located less than 2,500 light-years away, the Cone Nebula is relatively close to Earth, making it a well-studied object ... This type of plume forms when newly formed bright blue stars emit stellar winds and intense ultraviolet radiation that expels material from their vicinity ... ....

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