galactic wind

galactic wind

A substantial outflow of hot gas from a galaxy that has recently suffered a high burst of star formation or a merger. The gas has a velocity of a few hundred kilometers per second and is usually hot enough to emit in X-rays. The occurrence of galactic winds has implications for the energetics, chemical enrichment, and evolution of galaxies and their environment.
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Caption: SPEEDING STARBIRTH Astronomers found stars forming within the galactic wind pouring out of the galaxy IRAS F23128-5919, depicted here in an artist's conception.
Black hole winds may be linked to another type of galactic wind.
A particularly troublesome cloud zone in a star-forming region near the Aquila Rift, about 80 light years away, was clearly headed our way pushed by galactic wind, and may collide with the Earth's protective bubble within the next 50,000 years.
Some of this gas could escape in the form of a galactic wind.
On the other side of the boundary, electrically charged particles from the galactic wind blow by, but rebound off the heliosheath, never to enter the solar system.
The observed CH+ reveals dense shock waves, powered by hot, fast galactic winds originating inside the galaxies' star-forming regions.
The team determined that galactic winds alone could not replenish the newly revealed gaseous reservoirs and suggests that the mass is provided by galactic mergers or accretion from hidden streams of gas, as predicted by current theory.
But those produced in the EAGLE (Evolution and Assembly of Galaxies and their Environments) simulation have proved to be more realistic thanks in large part to recreating strong galactic winds - cosmic gas gales driven by stars, supernova explosions and supermassive black holes.
But those produced in the EAGLE (Evolution and Assembly of Galaxies and their Environments) simulation have proved to be more realistic thanks to accurately recreating galactic winds - cosmic gas gales driven by stars, supernova explosions and supermassive black holes.
Washington, August 22 ( ANI ): Sifting through images and data from three telescopes, a team of astronomers found 29 objects with outflowing winds measuring up to 2,500 kilometers per second, an order of magnitude faster than most observed galactic winds.
Scientists speculate that the weird phenomenon could be down to supernovae - star "explosions" - being more common at the centre of the galaxy than previously thought, galactic winds or even the annihilation of mysterious "dark matter", which makes up the bulk of the universe, but its make-up is unknown.
Theories include higher numbers of supernovae, galactic winds and even the annihilation of dark-matter particles," said Greg Dobler, Planck collaborator from the University of California in Santa Barbara, Calif.