Discovery of very-high-energy gamma-rays from the Galatic Centre ridge
Article Abstract:
The source of Galactic cosmic rays originate in the shock waves of expanding supernova remnants and their observations were carried out with the High Energy Stereoscopic Systems, a system of four imaging atmospheric-Cherenkov telescopes. The gamma-ray flux was found to approximately trace the density of interstellar gas, illustrating that the flux of cosmic rays is roughly constant throughout the Galaxy.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
High-energy particle acceleration in the shell of a supernova remnant
Article Abstract:
The supernova remnant (SNR) RX J1713.7-3946 that was discovered by ROSAT in the X-ray spectrum and later claimed as a source of high-energy gamma rays of TeV energies is reported. A TeV gamma-ray image of the SNR the spatially resolved remnant has a shell morphology similar to that seen in X-rays that demonstrates that very-high-energy particles are accelerated there.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
User Contributions:
Comment about this article or add new information about this topic:
A low level of extragalactic background light as revealed by gamma-rays from blazars
Article Abstract:
The discovery of gamma-ray emission from the blazars H 2356-309 and 1ES 1101- 232, at redshifts z=0.165 and z= 0.186 are reported. An alternative approach is the study of the absorption features imprinted on the gamma-ray spectra of distant extragalactic objects by interactions of photons with background light photons.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Further evidence for small-bodied hominins from the late pleistocene of flores, Indonesia. A new small-bodied hominin from the Late Pleistocene of Flores, Indonesia
- Abstracts: An enigmatic long-lasting gamma-ray burst not accompanied by a bright supernova. An origin for short gamma-ray bursts unassociated with current star formation
- Abstracts: A structural role for hormone in the thyroid hormone receptor. Bile acids heat things up
- Abstracts: wingless refines its own expression domain on the Drosophila wing margin. Evidence that stem cells reside in the adult Drosophila midgut epithelium
- Abstracts: DNA-guided crystallization of colloidal nanoparticles. Green fluorescent RNA