Boxden hiphop sports wild'ish games movies news eyecandy tech gear rides
trending now most viewers #top20 top yesterday all sections videos pics tracks headlines

Mysterious cosmic rays leave scientists in the dark

most watched this minute | see more
most viewed right now
263 viewing
 Image inside Drake shows off new ring....scary photo?
28 comments
most viewed right now
167 viewing
 Image inside Drake receives free Rolls Royce wraith
106 comments

top in section
117 viewing
 after this week, you think Kendrick/TDE would even attempt goin at Drake now?
top in hiphop
top in section
31 viewing
 Image inside Seen Too Much Money In Just 2 Days
top in rides

people viewing this topic:   (0 members and 1 guests)  
 
 

let em know » Share this on TwitterShare this on Facebook
 Mysterious cosmic rays leave scientists in the dark
Unread 3 years agoclass of '11 - away - #1
1415 pageviews
11 comments


s7venwords 4727 heat pts4727 space
avatar space
First 9 Representative
space
$31,637 | POWERFUL
Origins are not likely from most powerful explosions in the universe, researchers say

By Charles Q. Choi
updated 2 hours 43 minutes ago

The mystery of the origin of the strongest cosmic rays has deepened as new clues into key suspects, the most powerful explosions in the universe, suggest they are likely not potential culprits, researchers say.


[pic - click to view]


NSF/J. Yang
Little is know about the ultra high-energy cosmic rays that penetrate that regularly the atmosphere. Recent IceCube results challenge one of the leading theories, that they come from Gamma Ray Bursts.

Cosmic Rays bombing the Moon Transform Lunar Surface | Space Radiation | Space.com are charged subatomic particles that streak to Earth from deep in outer space. A few rare cosmic rays are extraordinarily powerful, with energies up to 100 million times greater than any attained by human-made particle colliders, such as CERN's Large Hadron Collider. The sources of these cosmic rays are a mystery.

"Nature is capable of accelerating elementary particles to macroscopic energies," said study co-author Francis Halzen at the University of Wisconsin-Madison, principal investigator at the IceCube Neutrino Observatory, a massive telescope designed to find the tiny subatomic particles. "There are basically only two ideas on how she does this — in gravitationally driven particle flows near the supermassive black holes at the centers of active galaxies, and in the collapse of stars to a black hole, seen by astronomers as gamma-ray bursts."

The prime suspect
Gamma-ray bursts are the Huge Space Explosion Could Be Most Distant Thing Ever Seen | GRB 090429B, Gamma-ray , Bursts & Supernovas | Space Explosions & NASA Swift Satellite | Space.com . They can emit as much energy as our sun during its entire 10-billion-year lifetime in anywhere from milliseconds to minutes.

"Some gamma-ray bursts are thought to be collapses of supermassive stars — Hypernovas: Thermonuclear Flashbulbs | Space.com while others are thought to be collisions of black holes with other black holes or neutron stars," said study co-author Spencer Klein of the U.S. Department of Energy's Lawrence Berkeley National Laboratory. "Both types produce brief but intense blasts of radiation."

New evidence may now rule out gamma-ray bursts as sources of these ultra-high-energy cosmic rays.

Researchers employed the IceCube neutrino detector, an array of thousands of detectors encompassing a cubic kilometer of clear Antarctic ice at the South Pole. Neutrinos are ghostly particles that often pass right through matter, only rarely striking atoms.

"This is a coming-of-age for Exotic Antimatter Caught in Disappearing Act | Antimatter & Neutrino Oscillations | LiveScience — the first time we're able to use neutrino data as a new way of looking at astrophysical objects and say something substantive about them," said study co-author Nathan Whitehorn, a physicist at the University of Wisconsin-Madison, who led the recent gamma-ray burst research with Peter Redl of the University of Maryland.

Evidence points elsewhere

The investigators focused on neutrinos whose energy levels suggest they are linked with gamma-ray bursts. The fireballs that give rise to the gamma rays seen in gamma-ray bursts were thought to potentially hurl particles at very high energies, generating both cosmic rays and energetic neutrinos.

After analyzing data on 307 gamma-ray bursts in 2008 and 2009, the scientists discovered the levels of these neutrinos were at least 3.7 times lower than expected. This suggests gamma-ray bursts are probably not the sources of the most powerful cosmic rays.

"After observing gamma-ray bursts for two years, we have not detected the telltale neutrinos for cosmic-ray acceleration," Halzen said.

Still, it could be that current models of neutrino production from these events might be off.
"We're not entirely clear yet as to what this neutrino flux we're not seeing might mean," Whitehorn told SPACE.com. "Our understanding of gamma-ray bursts is not complete — there's a lot of theoretical uncertainty. I suspect what will happen now is that there'll be a lot of efforts in the theory community of how to get neutrino fluxes compatible with the results."

Instead of gamma-ray bursts, researchers note that black holes at the centers or nuclei of active galaxies may be responsible for these ultra-high-energy cosmic rays, sucking in matter and spitting out enormous particle jets as they gorge.

"Active galactic nuclei are big — great big accelerators that may be able to accelerate particles to very high energies," said Klein, a long-time member of the IceCube Collaboration.
IceCube has looked for neutrinos from active galactic nuclei, but as yet the data is inconclusive.

The scientists detailed their findings in the April 19 issue of the journal Nature.

Mysterious cosmic rays leave scientists in the dark - Technology & science - Space - Space.com - msnbc.com
Reply With Quote
Props given to s7venwords hot topic  (04-18-2012)

11 comments for "Mysterious cosmic rays leave scientists in the dark"

- To post a comment, join the squad -


Unread 3 years agoclass of '07 - away - #2
Damagegadget 418 heat pts418 space
avatar space
TWERK KOBAIN
space
$26,600 | POWERFUL
scientist don't know isht lol
Reply With Quote
Unread 3 years agoclass of '06 - away - #3
LakerFan 5 heat pts space
avatar space
Senior Member
space
$1,846 | 8230609
Recent IceCube results challenge one of the leading theories, that they come from Gamma Ray Bursts
.


so he raps, makes movies, AND solves the mysteries of the universe?
Reply With Quote
Unread 3 years agoclass of '09 - away - #4
TIP2009  space
avatar space
Grand Hustle PSC
space
$2,223 | 0
impeach obama, we'd still have nasa, and not some sh*tty 3rd world healthcare being pushed on its' citizens, and probably with that little nasa agency, we'd have answers too....
Reply With Quote
Unread 3 years agoclass of '07 - away - #5
djdeez1211  space
avatar space
Senior Member
space
$760 | 991533
Thy Last Don said:
the Galactic plane

the cosmos never lie
Reply With Quote
Unread 3 years agoclass of '04 - away - #6
yo baby daddy  space
avatar space
Triple threat
space
$777 | 927176
This sh*t sounds complicated. Even if NASA knew the truth. They wouldn't tell us sh*t we really wanna know.
Reply With Quote
Unread 3 years agoclass of '07 - away - #7
Damagegadget 418 heat pts418 space
avatar space
TWERK KOBAIN
space
$26,600 | POWERFUL
TIP2009 said:
impeach obama, we'd still have nasa, and not some sh*tty 3rd world healthcare being pushed on its' citizens, and probably with that little nasa agency, we'd have answers too....
lol as if impeaching obama is going to change the face of our government.. if that was the case every president should have been impeached.. and Nasa is still there... you really think they are going to cease operations
Reply With Quote
Unread 3 years agoclass of '07 - away - #8
Damagegadget 418 heat pts418 space
avatar space
TWERK KOBAIN
space
$26,600 | POWERFUL
yo baby daddy said:
This sh*t sounds complicated. Even if NASA knew the truth. They wouldn't tell us sh*t we really wanna know.
of course... because people in power..don't want to lose their power. If people actually knew that they have been going about their lives slaving away for no reason...even ole granny's would be rioting lol
Reply With Quote
Unread 3 years agoclass of '10 - away - #9
Trilluminati GA 410 heat pts410 space
avatar space
HardOnHoes2K15
space
$40,082 | POWERFUL
Reply With Quote
 

Home > all sections > Faculty of Science
  
    
          join bx


 




that hot ish yesterday


most viewed right now
102 viewing
Well damn, Potent dj drama/meek/drake tea via lipstickalley
442 comments
@hiphop
most viewed right now
50 viewing
NBA RIP to Stanley Johnson mom
73 comments
@sports
most viewed right now
28 viewing
Image inside OVOFest The Official Potential Meek Mill Burial Anticipation Thread 8/..
121 comments
@hiphop
most viewed right now
27 viewing
Video inside She Went Off: Mom Catches Her 14 Year Old Daughter With A 21 Year Old!
97 comments
@wild'ish
most viewed right now
17 viewing
Image inside Aug 1 - CEO who set firm's minimum wage at $70,000 hits hard times
84 comments
@news
most viewed right now
15 viewing
Real Talk If Meek The Realst One In The Beef , Why He Catching So Much Hate....
180 comments
@hiphop
most viewed right now
11 viewing
Image inside Aug 1 - Nobody Wants This Dome- Scorching Heat Dome Over Middle East S..
55 comments
@news
most viewed right now
11 viewing
Article inside ‘Straight Outta Compton’ Reviews Are In, ’The Avengers’ Of Rap Biopics
123 comments
@movies
most viewed right now
10 viewing
Aug 1 - Text reveals Subway’s Jared paid 16-year-old for sex
110 comments
@news

^
contact us   |   bx@twitter   |   bx@facebook   |   privacy   |   search   |  © BX 1998-end of time