Astronomy
Supernovas may actually help to keep galaxies clean. Scientists have found that the massive explosions that mark the end of a star's life work with supermassive black holes to sweep gas out of a galaxy's star-forming factory.
In this latest study, the researchers discovered that black holes located at the cores of galaxies launch fountains of charged particles, which can stir up gas throughout the galaxy and temporarily interrupt star formation. Unless something intervenes, the gas will eventually cool and start forming stars again.
The astronomers found that supernovas might act as the maid service of the universe by sweeping the gas, thus shutting off star formation.
"Our previous research had shown that black-hole outbursts can limit star formation in massive galaxies, but they can't completely shut it off," said Mark Voit, one of the researcher.
"Something else needs to keep sweeping out the gas that dying stars continually dump into a galaxy, and supernova sweeping appears to work perfectly for that," Voit pointed out.
The findings may help astronomers to understand why some massive galaxies stopped forming stars billions of years ago.
source:- scienceworldreport.com
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Astronomy
Supernova helps keep Galaxies clean
In this latest study, the researchers discovered that black holes located at the cores of galaxies launch fountains of charged particles, which can stir up gas throughout the galaxy and temporarily interrupt star formation. Unless something intervenes, the gas will eventually cool and start forming stars again.
The astronomers found that supernovas might act as the maid service of the universe by sweeping the gas, thus shutting off star formation.
"Our previous research had shown that black-hole outbursts can limit star formation in massive galaxies, but they can't completely shut it off," said Mark Voit, one of the researcher.
"Something else needs to keep sweeping out the gas that dying stars continually dump into a galaxy, and supernova sweeping appears to work perfectly for that," Voit pointed out.
The findings may help astronomers to understand why some massive galaxies stopped forming stars billions of years ago.
source:- scienceworldreport.com
- Spitzer Telescope Detects Dust Around Carbon Star
Dust plays an important role in the evolution of galaxies like our Milky Way.With the help of NASA's Spitzer space telescope researchers have observed dust forming around the carbon star MAG 29, located 280,000 light years away from a smaller galaxy...
- A Humongous Star Explosion
The "SN 2006gy" explosion took place in the galaxy called NGC 1260, 240 million light-years away. It was 100 times more powerful than most typical supernovas, the brightest and most energetic ever recorded. It was first detected in September 2006, using...
- Study Reveals The Link Between Black Holes And Galaxy Merger
In a recent survey, scientists have found a clear link between the presence of super-massive black holes that power high-speed radio-signal emitting jets and the merger history of their host galaxies. It was also discovered that almost all of the...
- Milky Way
Milky Way Facts It?s warped. The Milky Way is a disk about 120,000 light years across , with a central bulge that has a diameter...
- Galaxy
Picture Of The Day(Stars and Galaxies) Galaxy ...