vincent Posted May 9, 2005 Share Posted May 9, 2005 Posted just a few minutes ago! Astronomers photographed a cosmic event this morning which they believe is the birth of a black hole, SPACE.com has learned.A faint visible-light flash likely heralds the merger of two dense neutron stars to create a relatively low-mass black hole, said Neil Gehrels of NASA's Goddard Space Flight Center. It is the first time an optical counterpart to a very short-duration gamma-ray burst has ever been detected. Gamma rays are the most energetic form of radiation on the electromagnetic spectrum, which also includes X-rays, light and radio waves. The merger occurred 2.2 billion light-years away, so it actually took place 2.2 billion years ago and the light just reached Earth this morning. Quick global effort Gehrels said the burst occurred just after midnight East Coast time. It was detected by NASA's orbiting Swift telescope. Swift automatically repositioned itself within 50 seconds to image the same patch of sky in X-rays. It just barely caught an X-ray afterglow, Gehrels said in a telephone interview. The X-ray counterpart was barely detectable and only observed for a few hundred seconds. An email was sent out to astronomers worldwide, and large observatories then tracked to the location spotted a visible-light afterglow. Gamma ray bursts are mysterious beasts. They come from all over the universe. Long-duration bursts, lasting a few seconds, are thought to be associated with the formation of black holes when massive stars explode and collapse. In recent years, scientists have detected X-ray and optical afterglows of these long bursts. Very short-duration bursts, like the one this morning, last only a tiny fraction a second. Until now, no optical afterglows from these bursts have been detected. Theorists think the burst represent the formation of a black hole a few times the mass of the Sun, but if so, then there should be bursts of X-rays and visible light, too. The burst has been named GRB050509b. What happened Steinn Sigurdsson, a Penn State University researcher who is excited about the observations but was not involved in them, explained what theorists think happened: Over a long time period, at least a hundred million years and perhaps billions of years, the two neutron stars spiraled toward each other. Neutron stars themselves are very dense objects, collapsed stellar remnants. "A fraction of a second before contact, the lower mass neutron star is disrupted and forms a neutrino driven accretion disk around the higher mass neutron star," Sigurdsson told SPACE.com. "It implodes under the weight and forms a maximally spinning low-mass black hole." Astronomers can't see black holes, because light and everything else that enters them is lost to observation. But just before material falls in, some high-energy process -- likely involving magnetism and speeds approach that of light -- vents some of the material back into space. The gamma ray burst signals the formation of a superheated jet of gas being shot out from the chaotic region around the newly formed black hole at a significant fraction of light-speed, Sigurdsson said. "This really does look like a merger scenario," said Gehrels, who heads up the scientific operations for the Swift satellite. The first gamma-ray burst was detected by accident in 1967. It was found by U.S. satellites deployed to monitor possible violations of the nuclear test ban treaty. Researchers now know that one erupts roughly every day somewhere in the cosmos. Most originate many billions of light years away. Each burst can briefly outshine an entire galaxy. space.com Link to comment Share on other sites More sharing options...
Tungsten T Posted May 10, 2005 Share Posted May 10, 2005 Cool This should be in BPN Its real Link to comment Share on other sites More sharing options...
Colin-uk Veteran Posted May 10, 2005 Veteran Share Posted May 10, 2005 so it actually took place 2.2 billion years ago Bit late arnt they :p jk lol, cool news :) Link to comment Share on other sites More sharing options...
H5N Posted May 10, 2005 Share Posted May 10, 2005 Amazing. :) Link to comment Share on other sites More sharing options...
username Posted May 11, 2005 Share Posted May 11, 2005 i read a theory that the other side of black holes are like minature big bangs... Link to comment Share on other sites More sharing options...
emo Posted May 11, 2005 Share Posted May 11, 2005 very interesting. Link to comment Share on other sites More sharing options...
ramesees Posted May 12, 2005 Share Posted May 12, 2005 The merger occurred 2.2 billion light-years away, so it actually took place 2.2 billion years ago and the light just reached Earth this morning. Something about this made me :D, dont know why :) Link to comment Share on other sites More sharing options...
Elmo Posted May 12, 2005 Share Posted May 12, 2005 coool i dont like to think too much about space makes me go insane Link to comment Share on other sites More sharing options...
sundayx Veteran Posted May 12, 2005 Veteran Share Posted May 12, 2005 mmmm i wonder what the black holes like at this instant. Link to comment Share on other sites More sharing options...
s0wi Posted May 28, 2005 Share Posted May 28, 2005 Where does the stuff that gets sucked up by the black hole go? Link to comment Share on other sites More sharing options...
Zoiks Posted May 29, 2005 Share Posted May 29, 2005 theres a thread about that in this forum, go take a squiz Link to comment Share on other sites More sharing options...
Shetland Posted May 29, 2005 Share Posted May 29, 2005 CoolThis should be in BPN Its real 585901645[/snapback] that sounds like your saying this entire forum is a joke. thats not very nice, lots of people post theories here that are quite possibly important Link to comment Share on other sites More sharing options...
RazorSA Posted May 29, 2005 Share Posted May 29, 2005 star trek here we come baby !!!! Link to comment Share on other sites More sharing options...
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