منابع مشابه
Gamma - Ray Telescopes 400 Years of Astronomical Telescopes
The last half-century has seen dramatic developments in γ−ray telescopes, from their initial conception and development through to their blossoming into full maturity as a potent research tool in astronomy. Gamma-ray telescopes are leading research in diverse areas such as γ−ray bursts, blazars, Galactic transients, and the Galactic distribution of Al.
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Gamma-ray telescopes are capable of measuring radioactive trace isotopes from cosmic nucleosynthesis events. Such measurements address new isotope production rather directly for a few key isotopes such as Ti, Al, Fe, and Ni, as well as positrons from the β-decay variety. Experiments of the past decades have now established an astronomy with γ-ray lines, which is an important part of the study o...
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We propose that axionlike particles (ALPs) with a two-photon vertex, consistent with all astrophysical and laboratory bounds, may lead to a detectable signature in the spectra of high-energy gamma-ray sources. This occurs as a result of gamma rays being converted into ALPs in the magnetic fields of efficient astrophysical accelerators according to the "Hillas criterion", such as jets of active ...
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The technique of γ-ray astronomy at very high energies (VHE:> 100 GeV) with ground-based imaging atmospheric Cherenkov telescopes is described, the H.E.S.S. array in Namibia serving as example. Mainly a discussion of the physical principles of the atmospheric Cherenkov technique is given, emphasizing its rapid development during the last decade. The present status is illustrated by two examples...
متن کاملGround based gamma-ray astronomy with Cherenkov Telescopes
Very-high-energy (>100 GeV) γ-ray astronomy is emerging as an important discipline in both high energy astrophysics and astro-particle physics. This field is currently dominated by Imaging Atmospheric-Cherenkov Telescopes (IACTs) and arrays of these telescopes. Such arrays have achieved the best angular resolution and energy flux sensitivity in the γ-ray domain and are still far from the fundam...
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ژورنال
عنوان ژورنال: Experimental Astronomy
سال: 2009
ISSN: 0922-6435,1572-9508
DOI: 10.1007/s10686-009-9164-7