Astronomers Discover a New Stage of Galaxy Evolution — the ‘Cold Quasar’

The workings of the Universe.
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fred8615
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Astronomers Discover a New Stage of Galaxy Evolution — the ‘Cold Quasar’

Post by fred8615 » June 20th, 2019, 2:51 pm

Quasars are supermassive black holes actively gobbling material from the galaxy around them. While black holes are known for pulling material in, the turbulent swirl of that whirlpool often also flings material and radiation out at high energies, enabling quasars to be seen from across the universe. They are some of the brightest objects astronomers know.

But a quasar can be bad news for its host galaxy. To form stars, a galaxy needs reservoirs of cold gas that can clump together, not gas that’s being violently heated and swept away by a raging black hole.

So galaxies containing quasars are thought to be at the end of their productive lives, no longer capable of forming stars. But Allison Kirkpatrick, from the University of Kansas, recently revealed a whole set of galaxies that contain both violent quasars and cold pools of gas — meaning they might yet be capable of making new stars in their old age.

Read more: http://blogs.discovermagazine.com/d-bri ... ld-quasar/
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

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