All Articles Tagged As: black holes
Scientists too showcase their exciting work looking at Einstein's general theory of relativity, black holes and gravitational waves.
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 | Radio-telescope images have revealed previously-unseen galactic cannibalism -- a triggering event that leads to feeding frenzies by gigantic black holes at the cores of galaxies ...> Full Article |
 | The biggest black holes may feed just like the smallest ones ...> Full Article |
Astronomers have discovered a previously unexpected astronomical phenomenon - a radio jet in a star system where none had been expected - which suggests that all stars and black holes feed in the same way.
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 | While observing a sample of quasars with broad absorption line (BAL) in their spectra, researchers discovered that unlike most of BAL quasars, two of the observed do not show intrinsic X-ray absorption, indicating a different composition of matter in their outflows ...> Full Article |
 | A set of 29 Hubble Space Telescope (HST) images of an exotic type of active galaxy known as a "post-starburst quasar" show that interactions and mergers drive both galaxy evolution and the growth of super-massive black holes at their centers. ...> Full Article |
 | Thirty-seven miles apart, twin stars orbit each other on a high-speed collision course ...> Full Article |
 | Although the universe contains billions of galaxies, only a small amount of its matter is locked up in these behemoths. Most of the universe's matter that was cooked up during and just after the Big Bang must be found elsewhere. ...> Full Article |
 | Physicists have provided a mechanism by which information can be recovered from black holes, those regions of space where gravity is so strong that, according to Einstein's theory of general relativity, not even light can escape. The team's findings pave the way toward ending a decades-long debate sparked by renowned physicist Stephen Hawking. ...> Full Article |
International scientists have used flowing water to simulate a black hole, testing Stephen Hawking's theory that black holes are not black after all.
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 | The fate of stars that venture too close to massive black holes could be even more violent than previously believed ...> Full Article |
 | Gravitational rocket propelled the monster at a speed of thousands of kilometres per second ...> Full Article |
 | New telescope evidence suggests twisted magnetic fields in supermassive black holes cause particle and energy jets to surge out in corkscrews ...> Full Article |
 | Light echo of a high-energy flash from a black hole first observed in detail ...> Full Article |
 | Astronomers have discovered that our galaxy's central black hole let loose a powerful flare three centuries ago ...> Full Article |
 | XMM-Newton has been surprised by a rare type of galaxy, from which it has detected a higher number of X-rays than thought possible. The observation gives new insight into the powerful processes shaping galaxies during their formation and evolution. ...> Full Article |
 | The well-known naked-eye star cluster Omega Centauri may be home to an elusive intermediate-mass black hole ...> Full Article |
Extraordinary event could have been witnessed with the naked eye
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 | Scientists at the University of St Andrews have used lasers to simulate a black hole in their laboratory ...> Full Article |
 | Scientists hope that a new supercomputer being built by Syracuse University's Department of Physics may help them identify the sound of a celestial black hole. The supercomputer, dubbed SUGAR (SU Gravitational and Relativity Cluster), will soon receive massive amounts of data from the California Institute of Technology (Caltech) that was collected over a two-year period at the Laser Interferometer Gravitational-Wave Observatory (LIGO). ...> Full Article |
 | A team of astronomers has discovered a neutron star emitting an extended stream of powerful X rays, marking the first time such an extended X-ray jet has been detected originating from any class of object other than black holes. "This discovery shows that the unusual properties of black holes, such as the lack of an actual surface,- may not be required to form powerful X-ray jets, as was previously thought," said Niel Brandt, professor of astronomy and astrophysics, and one of the scientists on the team that made the discovery with NASA's Chandra X-ray Observatory. ...> Full Article |
 | A strange and violent fate awaits a white dwarf star that wanders too close to a moderately massive black hole. According to a new study, the black hole's gravitational pull on the white dwarf would cause tidal forces sufficient to disrupt the stellar remnant and reignite nuclear burning in it, giving rise to a supernova explosion with an unusual appearance. Observations of such supernovae could confirm the existence of intermediate-mass black holes, currently the subject of much debate among astronomers. ...> Full Article |
A young star is speeding away from the Milky Way so fast that astronomers have been puzzled by where it came from; based on its young age it has traveled too far to have come from our galaxy. Now by analyzing its velocity, light intensity, and for the first time its tell-tale elemental composition, Carnegie astronomers Alceste Bonanos and Mercedes López-Morales, and collaborators Ian Hunter and Robert Ryans from Queen's University Belfast have determined that it came from our neighboring galaxy, the Large Magellanic Cloud (LMC). The result suggests that it was ejected from that galaxy by a yet-to-be-observed massive black hole. The research will be published in an upcoming issue of the Astrophysical Journal Letters.
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 | NASA's Spitzer Space Telescope has detected plump black holes where least expected -- skinny galaxies. Like people, galaxies come in different shapes and sizes. There are thin spirals both with and without central bulges of stars, and more rotund ellipticals that are themselves like giant bulges. Scientists have long held that all galaxies except the slender, bulgeless spirals harbor supermassive black holes at their cores. Furthermore, bulges were thought to be required for black holes to grow. ...> Full Article |
A new study using results from NASA's Chandra X-ray Observatory provides one of the best pieces of evidence yet that many supermassive black holes are spinning extremely rapidly, according to a research team led by a Penn State astronomer. The whirling of these giant black holes drives powerful jets that pump huge amounts of energy into their environment and affects the growth of galaxies.
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A team of Sloan Digital Sky Survey (SDSS-II) scientists, led by Princeton University's Reinabelle Reyes and including astronomers at Penn State, has identified a large number of "hidden quasars" -- supermassive black holes in the centers of galaxies that are shrouded in light-absorbing dust and gas. According to Donald Schneider, coauthor of the paper and professor of astronomy at Penn State, "If one examines a photograph of one of the hidden quasars we discovered, it appears to be just an ordinary galaxy, although quasars are typically are 10 to 100 times more luminous than the Milky Way Galaxy." Schneider is the chair of the SDSS-II science group that studies quasars, which are powered by glowing, super-heated gas as it swirls into black holes a billion times more massive than the sun.
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 | An international team of physicists, including University of Oregon scientists, has concluded that last February's intense burst of gamma rays possibly coming from the Andromeda Galaxy lacked a gravitational wave. That absence, they say, rules out an initial interpretation that the burst came from merging neutron stars or black holes within Andromeda. ...> Full Article |
 | Scientists have made an important discovery about the highest-energy cosmic rays that hit the Earth - and the discovery leads back to supermassive black holes. ...> Full Article |
 | Using two NASA satellites, astronomers have discovered a black hole that obliterates a record announced just two weeks ago. The new black hole, with a mass 24 to 33 times that of our Sun, is the heftiest known black hole that orbits another star. ...> Full Article |
Astronomers unmask hundreds of black holes hidden in galaxies billions of light-years away.
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 | Astronomers have located an exceptionally massive black hole in orbit around a huge companion star. This result has intriguing implications for the evolution and ultimate fate of massive stars. ...> Full Article |
 | Delayed gamma rays from deep space may provide the first evidence for physics beyond current theories. ...> Full Article |
 | NASA has announced its intent to restart a small scientific satellite mission it had canceled in 2006 because of funding pressures created in part by the shift in the agency's focus to manned missions to the moon and Mars. ...> Full Article |
 | Researchers' equations suggest gravitational lensing could lead astronomers to 'naked singularities,' if such entities exist despite being banned by 'cosmic censorship' ...> Full Article |
 | The universe's earliest stars may hold clues to the nature of dark matter, the mysterious stuff that makes up most of the universe's matter but doesn't interact with light, cosmologists report in the 14 September issue of the journal Science. ...> Full Article |
 | Researchers may have solved information loss paradox to find black holes do not form ...> Full Article |
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