Nasa telescopes join forces to observe unparalleled explosion Nasa's speedi, hubble space telescope and chandra x ray observatory have teamed up to study probably the most puzzling cosmic blasts yet observed.More than not much later, high energy radiation is constantly on the brighten and fade from its location.Astronomers say they have not witnessed anything this bright, permanent and variable Pandora Glass Beads before.In general, gamma ray bursts mark the wreckage of a massive star, but flaring emission from these events never lasts lots of hours. Although scientific studies are ongoing, astronomers say that the unusual blast Pandora:http://www.halfcreammilk.com/ likely arose when a star came too close to its galaxy's central black hole.Forceful tidal forces tore the star apart, and the infalling gas is constantly on the stream toward the hole.In order to this model, the spinning black hole formed an outflowing jet along its spinning axis.A robust blast of x and gamma rays is seen if this jet is pointed in our direction. Onto march 28, swift's burst alert telescope discovered the source in the constellation draco when it erupted with the first in numerous powerful x ray blasts.The satellite made a decision a position for the explosion, now cataloged as gamma ray broke(Grb)110328A, And informed astronomers all over the globe. As dozens of telescopes taken on study the spot, astronomers quickly pointed out that a small, distant galaxy appeared very close to the swift position.A deep image taken by hubble on april 4 pinpoints the source of the explosion at the middle of this galaxy, which often lies 3.8 billion many years away. Exact same day, astronomers used nasa's chandra x ray observatory to create a four hour long exposure of the puzzling source.The particular, which locates the thing 10 times more precisely than swift can, shows that it lies at center of the galaxy hubble imaged. "We know of objects in our own galaxy able to produce repeated bursts, but they're thousands to millions of times less powerful than the bursts we are seeing now.This is truly fabulous, said andrew fruchter at the room telescope science institute in baltimore. "We've been eagerly awaiting the hubble observation, considered that neil gehrels, the lead science tecnistions for swift at nasa's goddard space flight center in greenbelt, maryland. "The fact that the explosion occurred in the center of a galaxy tells us its likely associated with a massive black hole.This solves a key question about the strange event, Most universe, introducing our own, contain central black holes with several times the sun's mass;Those in the most galaxies can be a thousand times larger.The disrupted star probably fell for a black hole less massive than the milky way's, along with a mass four million times that of our sun Astronomers Cheap Pandora Beads prior to this have detected stars disrupted by supermassive black holes, but none have demonstrated the x ray brightness and variability seen in grb 110328a.The cause has repeatedly flared.Simply because april 3, as an example, it has brightened by through five times. Scientists think that the x rays may be out of matter moving near the speed of light in a particle jet that forms as the star's gas falls toward the black hole. "The best explanation at this time is that we happen to be looking down the barrel of this jet, said andrew levan at the university of warwick in great britan, who led the chandra findings. "When we look along these jets, a lumination boost lets us view details we might otherwise miss, This illumination increase, to create relativistic beaming, occurs when matter moving on the speed of light is viewed nearly head on. Astronomers plan additional hubble findings to see if the galaxy's core changes brightness. Root cause:Nasa/goddard space emulator center Shareprint this articlerelatedan reputation gallery gift from nasa swiftsat, halfcreammilk 29 dec 2012, 11:00:55 s'av'e rrtre Hubble understands pandora clusterwed, 22 jun 2011, 17:02:33 EDT Nasa swift and hubble probe asteroid smashup debristhu, 28 april 2011, 17:01:49 EDT Nasa hubble makes a person millionth science observationtue, 5 jul 2011, 16:03:22 EDT Nasa remembers chandra x ray observatory 10th anniversarythu, 23 jul 2009, 10:33:24 EDT 30 days Noble gas molecule established in spacescientists discover double meaning in genetic codewith new study, aquatic comb jelly floats into new evolutionary positionspeeding up gene discoverynovel agent set for unique clinical test in inflammatory cancer of the breast Penn researcher traces a history of the american urban squirrelhidden details revealed in nearby starburst galaxysurprising diversity in aging revealed in natureasu researchers discover chameleons use colorful language to communicatethe mystery of lizard breath.
:: بازدید از این مطلب : 1972
|
امتیاز مطلب : 0
|
تعداد امتیازدهندگان : 0
|
مجموع امتیاز : 0
عضو شوید
عضویت سریع
آمار
وب سایت:
آمار مطالب
آمار بازدید
