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References in periodicals archive ?
X-ray pulses are common among smaller black holes, but the Durham research is the first to identify this activity in a super-massive black hole. Most galaxies, including the Milky Way, are believed to contain super-massive black holes at their centres.
The research conducted by the students was focused on the rotation of galaxies and the evolution of super-massive black holes in the universe.
UPDATE: In the 1970s and '80s, astronomers figured out that quasars are luminous disks of gas powered by super-massive black holes, most of which are located more than halfway across the universe.
London, Aug 26 (ANI): Astronomers believe they have discovered how the first super-massive black holes were born.
These super-massive black holes are called quasars, which consist of doughnut-shaped clouds of gas and dust that surround and feed the black holes.
By detecting these particles and charting the directions they come from, IceCube scientists aim to identify the sources of neutrinos: star-forming galaxies, super-massive black holes or perhaps some unknown violent objects.
Today, they have grown to super-massive black holes with 100 to 1,000 million solar masses and shine with moderately low luminosity compared to other active galaxies."
This will allow us to study normally quiescent super-massive black holes, probe relativistic accretion and jet formation, measure kinetic feedback into the ambient medium, test theoretical models of the evolution of black hole and neutron star binaries, and perhaps to identify coherent radio bursts at cosmological distances."
Quasars are the extremely bright centers of galaxies surrounding super-massive black holes, and binary quasars are pairs of quasars bound together by gravity.
It also points to a previously unrecognized role for super-massive black holes: limiting how big a galaxy can become.
Objective: Super-massive black holes in the centers of galaxies have active phases during which they are believed to expel large amounts of gas, quench star formation and shape the evolution of the entire galaxy.
"While it is widely accepted that stellar mass black holes are created during the death throes of massive stars, it is still unknown how super-massive black holes are formed," said the lead author of the research paper, Dr.