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Samples in periodicals archive:
They strengthen the case for an active galactic nucleus in the Milky Way's relatively recent past," he said.
Chandra showed that the characteristics of the gas didn't match those from an active galactic nucleus.
Then, the luminosity of the active galactic nucleus can be calculated.
Any bright galactic core not powered by starlight is known as an active galactic nucleus.
Theoretical models show that a merger is a great way to trigger an active galactic nucleus, because it funnels a lot of gas to the center of the galaxy.
Jaffe of the State University of Leiden in the Netherlands, the Hubble image provides the closest look yet at the center of a type of galaxy -- called an active galactic nucleus (AGN) -- that has a luminous, energetic core.
Washington, July 14 (ANI): It has long been a mystery that where the material comes from to activate a sleeping supermassive black hole and trigger violent outbursts at a galaxy's centre, so that it then becomes an active galactic nucleus.
At a distance of just over 11 million light-years, Centaurus A contains the closest active galactic nucleus to Earth.