News tagged with active galaxies

A new paradigm for active galactic nuclei

( -- Seyfert galaxies are similar to normal galaxies like our own Milky Way except in one critical respect: their nuclei are fantastically bright, in extreme instances as luminous as 100 billion suns. Astronomers ...

dateApr 24, 2012 in Astronomy
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Black holes and star formation

( -- It has long been recognized that galaxy mergers or even close interactions can play a vital role in shaping the morphology of galaxies. One way they can do so, it is thought, is by triggering bursts of star ...

dateFeb 09, 2012 in Astronomy
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What activates a supermassive black hole?

A new study combining data from ESO's Very Large Telescope and ESA's XMM-Newton X-ray space observatory has turned up a surprise. Most of the huge black holes in the centres of galaxies in the past 11 billion years were not ...

dateJul 13, 2011 in Astronomy
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