What turns on the super-bright galaxies called quasars? Astronomers have spotted what they think is evidence for their ignition switch. According to the researchers, the trigger was likely the merger of two galaxies. A quasar is in fact a large galaxy anchored by a super-massive black hole that is actively-very actively- feeding on surrounding gas.
Astronomers thought that the Quasars were strange nearby stars, after being first detected in the 1950s based on emissions of radio waves. But, it is later they figured out the brilliant beacons billions of light-years away.
Alan Stockton of the University of Hawaii in Honolulu, and lead author of a report on the findings in the Astrophysical Journal said, “The X-ray features are likely shock waves that could be a direct result of the turning on of the quasar about 4 billion years ago.”
Via: SPACE.com
What Turns the Super-Galaxies On?
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