The hunt for PeVatrons as the origin of the most energetic photons observed in the Galaxy Article 22 April 2024 References Weekes, T. C. et al. Observation of TeV gamma rays from the Crab nebula using the atmospheric Cerenkov imaging technique. Astrophys. J. 342, 379–395 (1989). Arti...
3. Canonical propagation of high-energy γ rays 3.1. Radiation transport of energetic photons in the Universe The propagation of energetic photons at energies considered here (109 eV to 1014 eV) is in most cases well approximated by the propagation in a classical vacuum. However, at cosmological...
Gamma-ray bursts (GRBs) are the brightest known sources of electromagnetic radiation with up to 1053erg emitted as gamma rays during an event which lasts just a few seconds. GRBs come from cosmological distances, with the measured and/or estimated redshift in the range0.5 ÷ 5. The ...
Gamma-ray bursts (GRBs) are brief flashes of γ-rays and are considered to be the most energetic explosive phenomena in the Universe. The emission from GRBs comprises a short (typically tens of seconds) and bright prompt emission, followed by a much longer afterglow phase. During the ...
Gamma-ray bursts. The short GRBs, on the other hand, are thought to originate from a completely different mechanism: the merger of two neutron stars. These events aren't nearly as powerful as their supernova cousins, but they wreak enough havoc locally to produce a flash of gamma-rays. ...
"In the south pole, there is a surplus of emissions of higher energy, of photons with 20 to 150 gigaelectronvolts (GeV), while most of the less energetic photons come from the north pole," Arsioli added. The gamma-ray emissions from the poles were particularly concentrated in June 2014,...
Gamma and E-beam radiations are the most energetic as they effectively kill vegetative pathogens and endospores. E-beam radiation delivers a higher radiation dose than Gamma radiation, penetrating less deep. Meanwhile, Gamma radiation can penetrate about 50 cm of the layers, E-beam radiation can...
The Monkey ranks 9th among all the 12 zodiac animals. The recent years of the monkey are 2028, 2016, 2004, 1992, 1980, 1968, 1956, 1944… The monkey is a symbol of wisdom. People born in the Monkey Year are competitive and energetic. They have a strong desire for power and love to...
A. Their wings are long and wide B. They can hover in the air for a long time C. The ratio of their wing length to wing width is very important D. They are the most energetic flier in nature 2.Which is the right order of Professor Lentink’s research?
Gamma rays are the most energetic part of the spectrum. They have the shortest wavelengths and highest frequencies. These characteristics make them extremely hazardous to life, but they also tell astronomers alotabout the objects that emit them in the universe. Gamma-rays do occur on Earth, creat...