The bubbles display a spectrum with higher peak energies than the diffuse gamma-ray glow seen throughout the sky. In addition, the bubbles display sharp edges in Fermi LAT data. Both of these ...

So seeing a diffuse gamma ray glow was not that surprising since we expect things to look smeared out at these energies. But we can measure the total energy, and we have a pretty good idea of what ...

Fermi scientists also believe the cosmic rays then become trapped in the galaxies by magnetic fields. The discovery will change the Fermi catalog of objects because “diffuse-gamma-ray-emitting ...

LHAASO has discovered a giant ultra-high-energy gamma-ray bubble structure in the Cygnus star-forming region, with multiple photons exceeding 1 PeV inside the structure, with the highest energy ...

The gamma-ray sky Gamma-ray astronomy can be traced back 50 years to a paper by the late US theoretical astrophysicist Philip Morrison, who argued that most of the visible light upon which traditional ...

Pulsars have very distinct spectra—that is, their emissions vary in a specific way with the energy of the gamma rays they emit. Using the shape of these spectra, we were able to model the glow of the ...

An excess of gamma-ray emission from our galactic center doesn’t seem to be the signature of dark matter, but rather a byproduct of thousands of newly-identified spinning neutron stars.

GLAST will also support research in several areas in fundamental physics. One such opportunity is provided by the diffuse gamma-ray cosmic background — a poorly-understood haze of giga-electron-volt ...

The research paper, “Probing Intergalactic Neutral Hydrogen by the Lyman-Alpha Red Damping Wing of Gamma-Ray Burst 130606A Afterglow Spectrum at z=5.913”, by Tomonori Totani, Kentaro Aoki ...