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: Creative Commons
Cactus plants under the starry sky with view of the Milky Way galaxy with constellations

Milky Way’s Newly Record-Breaking Stellar Black Hole Has The Mass Of 33 Suns

IFL Science 18 Apr 2024
This comfortably exceeds the previous record for a stellar black hole in our galaxy, which was around 20 solar masses, and has helped confirm theories about how an object of this mass could form ... They’re also thought to lose less mass through stellar winds, preserving that mass to black hole formation....

John Mayer Designed a New Watch That He Predicts “Will Outlive Me”

The Hollywood Reporter 18 Apr 2024
Guests enjoyed music by Questlove, with a special appearance by KCRW DJ Novena Carmel, and stargazed through telescopes, guided by astronomer Sandy Eulitt from Stellar Experiences. Crafted in 18-karat white gold, the self-winding 41mm Audemars Piguet Perpetual CalendarJohn ......

Coachella is bigger than ever. Where to find the best food spots for Weekend 2

The Los Angeles Times 16 Apr 2024
Arrive early ... Pro tip ... By the time I decided I did want a hand roll, a line was winding out of the booth ... Nope ... In this desert playground, a live performance can awaken the deepest part of your soul, a wind-milling art installation can alight your inner child and a stellar food spread can give you the energy to sing your heart out all night ... ....

Stellar Winds Coming From Other Stars Measured for the First Time

Universe Today 14 Apr 2024
In a study recently published in Nature Astronomy, they describe how they conducted the first direct measurements of stellar wind in three Sun-like star systems ... By observing the spectral lines of oxygen ions, they could directly quantify the total mass of stellar wind emitted by all three stars....

Stellar winds of three sun-like stars detected for the first time

Science Daily 12 Apr 2024
... loss rate of the stars via their stellar winds....

Trump and FISA: A fact check

Press Telegram 11 Apr 2024
In the wee hours of April 10, former President Donald Trump went onto his social media network, TruthSocial, and exclaimed, “KILL FISA, IT WAS ILLEGALLY USED AGAINST ME, AND MANY OTHERS ... Bush’s previously secret and illegal mass electronic surveillance program (codenamed STELLAR WIND) at least nominally constitutional ... what’s next?....

Roman Will Learn the Ages of Hundreds of Thousands of Stars

Universe Today 06 Apr 2024
The slowdown is caused by interactions between the star’s magnetic fields and the stellar wind, the stream of high-energy protons and electrons emitted by stars ... Ionized material from the solar wind will be carried along the field lines and, at some point, will escape the magnetic field lines altogether....
photo: NASA
How NASA’s Roman Telescope Will Measure Ages of Stars

How NASA's Roman Telescope will measure the ages of stars

Phys Dot Org 04 Apr 2024
That slowdown is caused by interactions between a stream of charged particles known as the stellar wind and the star's own magnetic field ... Measuring stellar rotation ... The study on stellar rotation promises to help inform potential survey strategies....

It’s Impossible to Overstate Just How Good Netflix’s ‘Ripley’ Is

The Daily Beast 04 Apr 2024
Written and directed by Oscar-winning screenwriter Steven Zaillian (Schindler’s List, The Irishman, The Night Of), shot by Oscar-winning cinematographer Robert Elswit (There Will Be Blood), and starring acclaimed actor Andrew Scott (All of Us Strangers, Fleabag), this is a sumptuous, suspenseful, and altogether stellar black-and-white series....

Webb probes an extreme starburst galaxy

Phys Dot Org 03 Apr 2024
These gaseous streamers are a galactic wind rushing out from the core of the starburst ... Two other papers from this team characterizing the stellar clusters and correlations among wind components of M82 are almost finalized ... Polycyclic Aromatic Hydrocarbon Emission at the Base of the M 82 Galactic Wind, arXiv (2024)....

10 James Webb space photos reveal cosmic nurseries where stars come to life

Business Insider 01 Apr 2024
Stellar nurseries, where new stars bloom to life, are thick clouds of gas and dust, a.k.a ... an emission nebulaThis image of NGC 604 highlights how stellar winds from brightly burning young stars carve cavities into the surrounding gas and dust cloud ... These bubbles were carved out by stellar winds from extremely hot, bright young stars within....

The Hubble Aims Its Powerful Ultraviolet Eye at Super-Hot Stars

Universe Today 30 Mar 2024
“Aside from the specific goals of the program, the stellar data can also be used in fields of astrophysics in ways we can’t yet imagine.” ... They can also reveal the powerful stellar winds coming from the hot blue stars. Massive blue stars have powerful winds that shape their surroundings....