News tagged with black hole accretion

Ghostly gamma-ray beams blast from Milky Way's center

( -- As galaxies go, our Milky Way is pretty quiet. Active galaxies have cores that glow brightly, powered by supermassive black holes swallowing material, and often spit twin jets in opposite directions. In contrast, ...

dateMay 29, 2012 in Astronomy
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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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Cygnus X-1: Blue supergiant pairs with black hole

Discovered in 1964 during a rocket flight, Cygnus X-1 holds the record for being the strongest X-ray source seen from Earth. The blue supergiant star designated as HDE 226868 is just part of this high-mass X-ray binary system... ...

dateJun 23, 2011 in Astronomy
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Black holes spinning faster than ever before

( -- Two UK astronomers have found that the giant black holes in the centre of galaxies are on average spinning faster than at any time in the history of the Universe. Dr Alejo Martinez-Sansigre of the University ...

dateMay 23, 2011 in Astronomy
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