News tagged with black hole accretion

Black hole jets might be molded by magnetism

Even though black holes—by their definition and very nature—are the ultimate hoarders of the Universe, gathering and gobbling up matter and energy to the extent that not even light can escape their gravitational ...

Dec 04, 2012
5 / 5 (7) 112

Star's 'cry' heralds new era for testing relativity

(Phys.org) -- Last year, astronomers discovered a quiescent black hole in a distant galaxy that erupted after shredding and consuming a passing star. Now researchers have identified a distinctive X-ray signal ...

Aug 02, 2012
4.6 / 5 (21) 0 | with audio podcast

Accreting black holes in galaxies

(Phys.org) -- Seyfert galaxies are like normal galaxies, our own Milky Way included, except in one critical respect: their nuclei are fantastically bright. In some instances they are as luminous as 100 billion ...

Jun 28, 2012
5 / 5 (3) 9 | with audio podcast

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

(Phys.org) -- 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. ...

May 29, 2012
4.2 / 5 (11) 16 | with audio podcast

A new paradigm for active galactic nuclei

(Phys.org) -- 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. ...

Apr 24, 2012
5 / 5 (3) 4 | with audio podcast

'Cosmic mirages' confirm accelerated cosmic expansion

(Phys.org) -- An international team of researchers led by Masamune Oguri at Kavli IPMU and Naohisa Inada at Nara National College of Technology conduced an unprecedented survey of gravitationally lensed quasars, ...

Apr 11, 2012
4.9 / 5 (9) 20 | with audio podcast

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 ...

Jun 23, 2011
4.8 / 5 (5) 2