Read article 'SN 2009bb: where are the gamma rays?'
Long-duration gamma-ray bursts are associated with peculiar supernova explosions and a long-lived radio afterglow emission has been detected for some of them. So the discovery of relativistic radio ej...
Read article 'Cosmic rays, climate and the origin of life'
Cosmic rays may not influence cloud cover, but they may have a role in the phenomenon of lightning.
Read article 'AGILE and Fermi see a flaring microquasar'
The two currently operating high-energy gamma-ray satellites have both detected Cygnus X-3 (Cyg X-3) during episodes of strong radio flaring. These first detections of a genuine microquasar in our gal...
Read article 'VERITAS observes the origin of cosmic rays'
The detection of very-high energy (VHE, E> 100 GeV) gamma-rays from the starburst galaxy Messier 82 (M82) by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) may...
Read article 'Can invading black holes explain GRBs?'
X-ray observations of gamma-ray bursts (GRBs) by the Swift satellite suggest that the central engine can be active for up to a few hours. A new theoretical study shows that this is difficult to explai...
Read article 'AMS gets its slot on a space shuttle in 2010'
AMS-02, the experiment that will seek dark matter, missing matter and antimatter in space aboard the International Space Station (ISS), has recently received the green light to be part of the STS-134 ...
Read article 'XMM-Newton sees fast-spinning white dwarf'
Using observations by ESA’s Newton X-ray multimirror satellite, XMM-Newton, a group of Italian astronomers has derived the characteristics of a peculiar binary system consisting of a white dwarf...
Read article 'Cosmology'
Massimo Giovannini reviews in 2015 Cosmology by Steven Weinberg.
Read article 'Telescopes pin down location of cosmic accelerator'
Teams have joined forces with astronomers to reveal the precise location of particle acceleration in the nearby giant radio galaxy M87.
Read article 'Galactic positrons are not from dark matter'
A new study on the propagation of positrons in the galaxy suggests that dark-matter annihilation or decay is not required to account for gamma-ray observations by ESA’s INTEGRAL satellite. It sh...
