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

photo: ESA/Webb, NASA & CSA, T. Ray (Dublin Institute for Advanced Studies)
Webb Telescope: A Prominent Protostar in Perseus
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James Webb telescope captures a dramatic image of newborn star

Digital Trends 04 Dec 2023
These luminous flares are created when stellar winds shoot off in opposite directions from newborn stars, as the jets of gas slam into nearby dust and gas at tremendous speed....
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Does Betelgeuse Even Rotate? Maybe Not

Universe Today 04 Dec 2023
Betelgeuse is the well known red giant star in the corner of Orion the hunter ... STScI, NASA, ESA) ... It is possible that mass loss due to stellar winds decreases rotation speeds further ... This is not an unusual process with an expected one-third of red supergiants experience stellar merger before their core collapses marking the end of their life ... Source ....
photo: X-ray: NASA/CXC/SAO; Optical: NASA/ESA/STScI/AURA; IR:NASA/JPL/Caltech; Image Processing: NASA/CXC/SAO/N. Wolk
Chandra Catches Spider Pulsars Destroying Nearby Stars
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Spider Pulsars are Tearing Apart Stars in the Omega Cluster

Universe Today 01 Dec 2023
Their energetic winds methodically strip away their companions’ outer layers ... Spider pulsars create X-rays when particles in their stellar winds strike the winds coming from their companions and produce shock waves. The more massive its companion is, the stronger the companion’s winds....
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Webb captures a prominent new star in Perseus

Sott 29 Nov 2023
Herbig-Haro objects are luminous regions surrounding newborn stars (known as protostars), and are formed when stellar winds or jets of gas spewing from these newborn stars form shockwaves colliding ......
photo: ESA/Webb, NASA & CSA, T. Ray (Dublin Institute for Advanced Studies)
Webb Telescope: A prominent protostar in Perseus
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Webb captures a prominent protostar in Perseus

Phys Dot Org 29 Nov 2023
Herbig-Haro objects are luminous regions surrounding newborn stars (known as protostars), and are formed when stellar winds or jets of gas spewing from these newborn stars form shockwaves colliding with nearby gas and dust at high speeds ... The bright infrared objects in the upper portion of the image are thought to host two further protostars ... .......
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A prominent protostar in Perseus

European Space Agency 28 Nov 2023
Image. ... Herbig-Haro objects are luminous regions surrounding newborn stars (known as protostars), and are formed when stellar winds or jets of gas spewing from these newborn stars form shockwaves colliding with nearby gas and dust at high speeds ... The bright infrared objects in the upper portion of the image are thought to host two further protostars....
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Stunning James Webb image shows the beating heart of our Milky Way

Digital Trends 21 Nov 2023
A new image from the James Webb Space Telescope shows the heart of our galaxy, in a region close to the supermassive black hole at the center of the Milky Way, Sagittarius A* ... NASA, ESA, CSA, STScI, S ... As stars form, they give off powerful stellar winds which blow away nearby material and prevent more stars from forming very close to them. Related....
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Lucid says its new all-electric SUV beats Tesla Model X range by nearly 100 miles

Popular Science 20 Nov 2023
The stellar range is also a result of Lucid’s proprietary winding technique that produces a denser magnetic field along with several other innovations that create a super-compact package. The company holds eight patents related to the motor’s windings and cooling, and ......
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Post World Cup, India braced for life sans stalwarts

Hindustan Times 20 Nov 2023
Rohit Sharma is 36, Virat Kohli 35, Ravindra Jadeja 34 and Mohammed Shami 33. (PTI). But where do India really go from another World Cup defeat, with another gifted generation set to wind up their stellar careers sooner than later? We're now on WhatsApp. Click to join. Rohit Sharma is 36, Virat Kohli 35, Ravindra Jadeja 34 and Mohammed Shami 33 ... .......
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The End Of Privacy Is Near

The Liberty Beacon 18 Nov 2023
Video Link. •••• ... government implemented Stellar Wind, a program to actively — and illegally — spy on all Americans within days of the 2001 9/11 attack ... are betraying the trust of their customers.” Through Stellar Wind, all phone calls and text messages were being intercepted and stored, and the Stellar Wind program has only expanded from there....
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The End of Privacy Is Near. “Artificial Intelligence Scours Social Media… You’re Being Spied Upon Everywhere”

GlobalResearch 17 Nov 2023
*** ... * ... The U.S. government implemented Stellar Wind, a program to actively — and illegally — spy on all Americans within days of the 2001 9/11 attack ... are betraying the trust of their customers.” Through Stellar Wind, all phone calls and text messages were being intercepted and stored, and the Stellar Wind program has only expanded from there ... *....
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JWST Follows Neon Signs Toward New Thinking on Planet Formation

Universe Today 16 Nov 2023
It comes down to the stellar wind ... All stars emit stellar winds, though their strength varies. In this image, powerful stellar winds from an aged central star form the so-called Butterfly Nebula (NGC 6302). The stellar winds from young T Tauri stars like SZ Cha don’t form a nebula, but they do interact with the protoplanetary disk....
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Earth's past and future habitability depends on our protection from space weather

Phys Dot Org 16 Nov 2023
"That means space weather conditions can introduce constraints on the habitability of the Earth and exoplanets with respect to the shielding provided by planetary magnetospheres, avoiding the sterilizing effect of the stellar wind on the surface," the authors explain....
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