... Spin up of a Supermassive Black Hole . ... 12.03.2013 . ... This prediction was tested recently by NASA's NuSTAR and ESA's XMM satellites by observing the supermassive black hole at the center of spiral galaxy NGC 1365 . ... Since matter randomly falling into the black hol e should not spin up a black hole this much, the NuSTAR and XMM measurements also validate the existence of the surrounding accretion disk . ... Publications with keywords: black hole - accretion disk . ... Orbiting a Black Hole ....

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• Heavy Black Hole Jets in 4U1630 47
• The View Near a Black Hole
• GRO J1655 40: Evidence for a Spinning Black Hole

... 2013 March 12 . Spin up of a Supermassive Black Hole . ... If any object made of regular matter spins too fast -- it breaks apart. ... This prediction was tested recently by NASA's NuSTAR and ESA's XMM satellites by observing the supermassive black hole at the center of spiral galaxy NGC 1365 . ... Since matter randomly falling into the black hol e should not spin up a black hole this much, the NuSTAR and XMM measurements also validate the existence of the surrounding accretion disk . ...

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• APOD Index - Stars: Black Holes
• APOD: 2004 September 8 - Molecular Torus Surrounds Black Hole
• APOD: 2013 November 20 - Heavy Black Hole Jets in 4U1630-47

... Black holes are found at the centres of galaxies which are similar in size to our own Milky Way Galaxy or larger. When black holes collide and merge they form supermassive black holes which are events among the most powerful in the universe. ... 55, No. 1, pages 1-5, 'Observational Effects of Strong Gravity in Vicinity of Supermassive Black Holes' . ... International Year of Astronomy, Ireland National Node . ...

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• Black Holes

... SS433 is a close binary system, one star is a supergiant, a second one is a black hole. ... Even a black hole cannot accept such an enormous mass flux, a supercritical accretion disk appears, all the excess gas glows up to several tens of thousands degrees and is ejected off the disk with enormous velocities. ... SAO researchers have found an evidence of the supercritical accretion onto a black hole in SS433, which follows from a brightness variability of the SS433 disk. ...

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• Metagalaxy sector, archive 2015
• SS433
• Metagalaxy sector, archive 2013

The radius of the event horizon of a black hole with the mass of the Sun would be about 3 kilometers, about the same size as your city, town or village. If the Earth could be compressed into a black hole, the radius of its event horizon would be 1/330,000 of this, because the mass of the Earth is 1/330,000 times the mass of the Sun. ... 30,000,000 . ... 20,000 . ... Black hole event horizon . ... MYTH: All stars collapse to become black holes upon their death. ... MYTH: Black holes are very dense. ...

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• ASP: Black Holes: An Introductory Resource List
• ASP: Beacons in the Gloom
• ASP: Black Holes to Blackboards: Seeing the Light

... HUBBLE UNCOVERS DUST DISK AROUND A MASSIVE BLACK HOLE . Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the jets in NGC 7052 are not perpendicular to the disk, it may indicate that the black hole and the dust disk in NGC 7052 do not have a common origin. ... NGC 7052 is located in the constellation of Vulpecula, 191 million light-years from Earth. ...

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• Active galaxies and black holes
• Swara's Publications
• Dust disk around a black hole in NGC 7052

The black hole (BH) masses in the centers of active galactic nuclei (AGNs) have been estimated for a sample of radio-selected, flat-spectrum quasars to investigate the relationship between BH mass and radio properties of quasars. ... In contrast to previous studies, we find no correlation between BH mass and radio power in these AGNs. We find a range in BH mass similar to that seen in radio-quiet quasars from previous studies. ... You can now find me in room 99 at Epping. ...

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• Merging Black Holes in Galaxies: Galaxy Evolution, AGN and Gravitational Waves
• The peculiar galaxy NGC 4258: A black hole candidate.
• ATNF Colloquium

... Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the front end of the disk eclipses more stars than the back, it appears darker. ... Despite its size, the disk is 100 times less massive than the black hole. ... The bright spot in the center of the disk is the combined light of stars that have crowded around the black hole due to its strong gravitational pull. ...

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• Hubble Finds A Bare Black Hole Pouring Out Light
• Hubble Provides Multiple Views of How to Feed a Black Hole (PRC98-14)
• Dust evolution across the CO snowline in a protoplanetary disk

... Ask Astro . ... Supernova showered Earth with radioactive debris . Behemoth black hole found in an unlikely place . ... black holes . ... Asteroid DayУ?т??т??s Don Yeomans: Will asteroid 2013 TX68 strike Earth? ... Ask Astro: What are the chances of dark matter or a black hole ripping apart Earth? ... Get instant access to subscriber content on Astronomy.com! ... Receive full access to our Ask Astro answers . ... A gamma-ray burst hints that LIGO's double black holes started as one massive star . ...

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• Could large numbers of black holes account for much of the "dark matter"
• Black holes inhale vast quantities of dust and gases. Does dark matter also get
• black holes | Astronomy.com

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Mad Science

... Feeding the Monster: Gas Caught in its Death Spiral into a Massive Black Hole . ... Stromlo Professor Mike Dopita have used the Hubble Space Telescope to discover how a massive Black Hole in a nearby galaxy feeds itself. ... Earlier Hubble Telescope data obtained by another team member, Professor Holland Ford of Johns Hopkins University in Baltimore, Maryland, had found a disk of gas rushing around the Black Hole at a speed of 500 kilometers a second. ...

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• Pink Black Holes: Frequently Asked Questions
• COALA - Computational Astrophysics Laboratory
• Some Black Holes are Pink