Cosmic rays linked to supernovae
Posted: Tue, Feb 19, 2013, 7:12 AM ET (1212 GMT)
Astronomers have found evidence suggesting that high-energy cosmic rays are produced in the shock fronts of supernova explosions. Observations by ground and space-based telescopes of supernovae indicated that their expanding shock waves can accelerate protons to close to the speed of light; most cosmic rays are such high-speed protons. Gamma-ray observations confirmed this origin by detecting gamma rays at the energies expected when an accelerated proton collides with a stationary one. Astronomers had previously speculated that supernovae were the source of cosmic rays, but lacked proof before these observations.
Astronomers have found evidence suggesting that high-energy cosmic rays are produced in the shock fronts of supernova explosions. Observations by ground and space-based telescopes of supernovae indicated that their expanding shock waves can accelerate protons to close to the speed of light; most cosmic rays are such high-speed protons. Gamma-ray observations confirmed this origin by detecting gamma rays at the energies expected when an accelerated proton collides with a stationary one. Astronomers had previously speculated that supernovae were the source of cosmic rays, but lacked proof before these observations.
Related Links:
| <<previous article | next article>> |
|
news in brief
|
|
Apex becomes billion-dollar company with $200 million Series D round
Posted: Sun, Sep 14 4:09 AM ET (0809 GMT) |
|
news links
|
|
Monday, September 15
Elon Musk's Starlink reports service outage, thousands of users affected
Reuters — 1:23 am ET (0523 GMT) What does the loss of U.S. Space Command mean to Colorado Springs?
Denver Post — 1:21 am ET (0521 GMT) SpaceX Launches Northrop Grumman Cargo Ship To ISS
Aviation Week — 1:18 am ET (0518 GMT) SpaceX launches Falcon 9 rocket from Cape Canaveral on Sunday
WESH-TV Orlando — 1:18 am ET (0518 GMT) Apollo 13 made Jim Lovell a legend generations after the space race
The Hill — 1:09 am ET (0509 GMT) |
