Invading black holes cause 'cosmic flashes'September 19th, 2009 WASHINGTON - Mathematicians at the University of Leeds, UK, have determined that cosmic flashes, known as gamma ray bursts, are produced by jets of plasma that originate from invading black holes. Gamma ray bursts are beams of high-energy radiation that are similar to the radiation emitted by explosions of nuclear weapons.
Galaxy hosting most distant supermassive black hole ever foundSeptember 3rd, 2009 WASHINGTON - A team of astronomers from the University of Hawaii has discovered a giant galaxy surrounding the most distant supermassive black hole ever found. The galaxy, which is 12.8 billion light-years from Earth, is as large as the Milky Way galaxy and harbors a supermassive black hole that contains at least a billion times as much matter as does our Sun.
Black hole is twice as big as originally thought: ScientistsAugust 24th, 2009 LONDON - New estimates bys scientists suggest that the black hole at the centre of the M87 galaxy may be twice as big as originally thought, and possibly large enough to measure directly. M87 is 55 million light years away.
Universe's first black holes kept to a strict dietAugust 11th, 2009 WASHINGTON - A new supercomputer simulation designed to track the fate of the universe's first black holes has found that the mysterious cosmic objects couldn't efficiently gorge themselves on nearby gas, and thus had to keep themselves on a strict diet, starving in the process. "The first stars were much more massive than most stars we see today, upwards of 100 times the mass of our sun," said John Wise, a post-doctoral fellow at NASA's Goddard Space Flight Center in Greenbelt, Maryland, and one of the study's authors.
"Naked" black hole's existence may breakdown laws of physics in UniverseAugust 10th, 2009 LONDON - Computer simulations indicate that a "naked" black hole may yet emerge in our universe, after spinning away its event horizon, which would lead to the breakdown of the laws of physics. In 1969, physicist Roger Penrose postulated that every singularity, or black hole, must be shrouded by an event horizon from which nothing, including light, can escape.
Turbulence caused by black holes responsible for halting star formationJuly 15th, 2009 LONDON - New simulations have revealed that turbulence created by jets of material ejected from the disks of the Universe's largest black holes is responsible for halting star formation. The simulations have been made by Evan Scannapieco, an assistant professor in the School of Earth and Space Exploration in the College of Liberal Arts and Sciences at Arizona State University (ASU) and Professor Marcus Brueggen of Jacobs University in Bremen, Germany.
Star clusters point to supermassive black holes kicked from host galaxiesJuly 10th, 2009 WASHINGTON - A new research has determined that the tight cluster of stars surrounding a supermassive black hole after it has been violently kicked out of a galaxy represents a new kind of astronomical object and a fossil record of the kick. The research, published in The Astrophysical Journal discusses the theoretical properties of "hypercompact stellar systems" and suggests that hundreds of these faint star clusters might be detected at optical wavelengths in our immediate cosmic environment.
New class of medium sized black holes foundJuly 6th, 2009 LONDON - Astronomers have come by the first solid evidence of a new class of medium sized black holes, with more than 500 times the sun's mass, in a distant galaxy. This new source, identified as HLX-1 (Hyper-Luminous X-ray source 1), lies towards the edge of the galaxy ESO 243-49.
Origin of very high-energy gamma rays pinpointed to giant black holeJuly 3rd, 2009 WASHINGTON - Using a worldwide combination of diverse telescopes, astronomers have discovered that a giant galaxy's bursts of very high energy gamma rays are coming from a region very close to the supermassive black hole at its core. The discovery provides important new information about the mysterious workings of the powerful "engines" in the centers of innumerable galaxies throughout the Universe.
Astronomers discover new class of black holesJuly 2nd, 2009 LONDON - An international team of astronomers has discovered a new class of black hole, more than 500 times the mass of the Sun. Astronomers made the finding in a distant galaxy approximately 290 million light years from Earth.
Weird space blobs turn out to be adolescent galaxies throwing final tantrum before growing upJune 24th, 2009 Telescope finds space blobs are pubescent galaxiesWASHINGTON — Mysterious space blobs aren't infant galaxies as astronomers once thought. Scientists say they mostly consist of galaxies going through puberty, all hot and bothered.
Stellar family in crowded and violent neighbourhood is surprisingly normalJune 5th, 2009 MUNICH - Astronomers have found that a stellar family near a supermassive black hole at the heart of the Milky Way, is surprisingly normal. Using ESO's Very Large Telescope, astronomers have obtained one of the sharpest views ever of the Arches Cluster - an extraordinary dense cluster of young stars near the supermassive black hole.
Astronomers probe close to supermassive black hole's edgeMay 28th, 2009 PARIS - Astronomers have used new data from ESA's (European Space Agency's) XMM-Newton spaceborne observatory, to probe closer than ever to a supermassive black hole lying deep at the core of a distant active galaxy. The galaxy - known as 1H0707-495 - was observed during four 48-hr-long orbits of XMM-Newton around Earth, starting in January 2008.
Rogue black holes may wander the Milky WayApril 30th, 2009 WASHINGTON - New calculations by scientists suggest that hundreds of massive rogue black holes, left over from the galaxy-building days of the early universe, may wander the Milky Way. The calculations have been made by Ryan O'Leary and Avi Loeb from the Harvard-Smithsonian Center for Astrophysics.
Black holes that can regulate the rate at which they growMarch 26th, 2009 WASHINGTON - New results from NASA's Chandra X-ray Observatory have suggested that a special class of black holes have a mechanism for regulating the rate at which they grow, and can shut off the high-speed jets they produce. Some stellar-mass black holes launch powerful jets of particles and radiation, like seen in quasars, and are called "micro-quasars".