Daily non-political popular news in brief.
A new mechanism for producing cosmic gamma rays from starlight is proposed
03-19-2007 · EurekAlert!In 2002, when astronomers first detected cosmic gamma rays coming from the constellation Cygnus, they were surprised and perplexed. The region lacked the extreme electromagnetic fields that they thought were required to produce such energetic rays. But now a team of theoretical physicists propose a mechanism that can explain this mystery and may also help account for another type of cosmic ray, the high-energy nuclei that rain down on Earth in the billions.
Read more »
Keywords: mechanism, producing, cosmic, gamma, rays, starlight, proposed, ray
« Previous | Next »
Similar news on "A new mechanism for producing cosmic gamma rays from starlight is proposed":
- Chandra discovers relativistic pinball machine
11-15-2006 · EurekAlert!
New clues about the origins of cosmic rays, mysterious high-energy particles that bombard the Earth, have been revealed using NASA's Chandra X-ray Observatory. An extraordinarily detailed image of the remains of an exploded star provides crucial insight into the generation of cosmic rays.
Similar news · Read more »
- NASA: major step toward knowing origin of cosmic rays
10-09-2007 · EurekAlert!
Recent observations from NASA and Japanese X-ray observatories have helped clarify one of the long-standing mysteries in astronomy -- the origin of cosmic rays.
Similar news · Read more »
- EuroNews looks at Integral
06-08-2007 · European Space Agency (ESA)
Integral is the first space observatory that can simultaneously observe objects in gamma rays, X-rays, and visible light. Its principal targets are gamma-ray bursts, powerful supernova explosions, and regions in the Universe thought to contain black holes. EuroNews talks to various scientists who are obtaining fascinating results from this laboratory.
Similar news · Read more »
- Intergalactic 'shot in the dark' shocks astronomers
12-18-2007 · EurekAlert!
A team of astronomers has discovered a cosmic explosion that seems to have come from the middle of nowhere -- thousands of light-years from the nearest galaxy-sized collection of stars, gas, and dust. This "shot in the dark" is surprising because the type of explosion, a long-duration gamma-ray burst, is thought to be powered by the death of a massive star.
Similar news · Read more »
- Milky Way black hole may be a colossal 'particle accelerator'
02-27-2007 · EurekAlert!
The black hole at the center of our Milky Way could be working like a cosmic particle accelerator, revving up protons that smash at incredible speeds into lower energy protons and creating high-energy gamma rays, University of Arizona astrophysicists say.
Similar news · Read more »
- Mysterious cosmic rays linked to galactic powerhouses
11-08-2007 · EurekAlert!
The sprawling Auger Cosmic Ray Observatory in South America has produced its first major discovery while still under construction. The international Auger collaboration has traced the rain of high-energy cosmic rays that continually pelts the Earth to the cores of nearby galaxies, which emit prodigious quantities of energy.
Similar news · Read more »
- UO plays key role in LIGO's new view of a cosmic event
01-03-2008 · EurekAlert!
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.
Similar news · Read more »
- Astronomers discover new kind of black-hole explosion
12-20-2006 · EurekAlert!
Scientists have discovered what appears to be a new kind of cosmic explosion -- a "hybrid gamma-ray burst" -- which will be the subject of four articles to be published in the journal Nature on 21 December 2006. The scientists include four astrophysicists at Penn State University as well as others around the globe. The nature of the explosion is a puzzle in "virtually uncharted territory" for space scientists.
Similar news · Read more »
- NASA and Gemini probe mysterious explosion in the distant past
01-08-2008 · EurekAlert!
Using the powerful one-two combo of NASA's Swift satellite and the Gemini Observatory, astronomers have detected a mysterious type of cosmic explosion farther back in time than ever before. The explosion, known as a short gamma-ray burst, took place 7.4 billion years ago, more than halfway back to the Big Bang.
Similar news · Read more »
- Two cosmic bursts upset tidy association between long gamma-ray bursts and supernovae
12-20-2006 · EurekAlert!
Only in the past decade have astronomers been able to make sense of the bright flashes of cosmic light known as gamma-ray bursts, which are the brightest explosions in the universe. But two newly observed bursts reported in this week's Nature suggest that not all can be neatly divided between long bursts associated with supernovae and short bursts due to stellar mergers.
Similar news · Read more »
