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Science, 2000
Relativistic outflows or "jets" are collimated streams of high-energy electrons that emit synchrotron radiation at radio wavelengths and have bulk velocities that are a substantial fraction of the speed of light. They trace the outflow of enormous amounts of energy and matter from a central supermassive black hole in distant radio galaxies.
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Relativistic outflows or "jets" are collimated streams of high-energy electrons that emit synchrotron radiation at radio wavelengths and have bulk velocities that are a substantial fraction of the speed of light. They trace the outflow of enormous amounts of energy and matter from a central supermassive black hole in distant radio galaxies.
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AIP Conference Proceedings, 2001
Several TeV sources γ-rays have been detected in the past decade, and others have been proposed. They can be divided into three main categories: galactic, extra-galactic, and exotic. Here I review the two former categories, which contain the sources which have been observed, with discussions of the source characteristics and the physical mechanisms by ...
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Several TeV sources γ-rays have been detected in the past decade, and others have been proposed. They can be divided into three main categories: galactic, extra-galactic, and exotic. Here I review the two former categories, which contain the sources which have been observed, with discussions of the source characteristics and the physical mechanisms by ...
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Annual Review of Astronomy and Astrophysics, 1983
In Volume 5 of the Annual Review of Astronomy and Astrophysics (1967) Giovanni Fazio (76a) wrote that "... up until now, no photons of energy greater than 100 keV originating from beyond the solar system have definitely been detected." Fourteen years later, gamma-ray astronomy is an accepted branch of observational astrophysics, with something like 105
G. F. Bignami, W. Hermsen
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In Volume 5 of the Annual Review of Astronomy and Astrophysics (1967) Giovanni Fazio (76a) wrote that "... up until now, no photons of energy greater than 100 keV originating from beyond the solar system have definitely been detected." Fourteen years later, gamma-ray astronomy is an accepted branch of observational astrophysics, with something like 105
G. F. Bignami, W. Hermsen
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Gamma-ray sources and equipment
1982In 1896 Becquerel discovered that certain of the heavier elements emitted penetrating radiation and were unstable; the earlier concept that elements represented the most stable form of matter had therefore to be abandoned. There are three radioactive series known in nature, the parent elements of which are uranium-238, uranium-235 and thorium-232. Each
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Proceedings of the Indian Academy of Sciences - Section A, 1971
Gamma-ray production by particles escaping from a pulsar into the surrounding nebula is considered. The gamma-ray emission decreases with time and such pulsar-nebula complexes will be observed as transient sources.
Krishna M. V. Apparao, T. N. Rengarajan
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Gamma-ray production by particles escaping from a pulsar into the surrounding nebula is considered. The gamma-ray emission decreases with time and such pulsar-nebula complexes will be observed as transient sources.
Krishna M. V. Apparao, T. N. Rengarajan
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2001
The first measurements of high-energy particles following solar flares in space and on the ground were performed during the 1940s, and by the 1960s the experiments were accurate enough to deduce spectral parameters. It was recognized that γ-ray continuum and, most importantly, γ-ray lines should be observable at high altitudes if a sufficiently large ...
Erich Rieger, Gerhard Rank
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The first measurements of high-energy particles following solar flares in space and on the ground were performed during the 1940s, and by the 1960s the experiments were accurate enough to deduce spectral parameters. It was recognized that γ-ray continuum and, most importantly, γ-ray lines should be observable at high altitudes if a sufficiently large ...
Erich Rieger, Gerhard Rank
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2004
The EGRET telescope has detected over 200 γ-ray sources above 100 MeV, but many remain unidentified because of their poor localization or their faintness at lower energies. Multi-wavelength searches have proved successful at finding interesting blazar and pulsar counterparts at high latitudes, but rarely in the Galactic plane because of confusion. Yet,
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The EGRET telescope has detected over 200 γ-ray sources above 100 MeV, but many remain unidentified because of their poor localization or their faintness at lower energies. Multi-wavelength searches have proved successful at finding interesting blazar and pulsar counterparts at high latitudes, but rarely in the Galactic plane because of confusion. Yet,
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Unidentified gamma-Ray Sources: Hunting gamma-Ray Blazars
2012One of the main scientific objectives of the ongoing Fermi mission is unveiling the nature of unidentified γ-ray sources (UGSs). Despite the major improvements of Fermi in the localization of γ-ray sources with respect to the past γ-ray missions, about one-third of the Fermi-detected objects are still not associated with low-energy counterparts ...
F. Massaro +5 more
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2004
From the contents:Preface.- 1. Introduction.- 2. Fundamentals of gamma-ray astrophysics.- 3. Galactic gamma-ray sources.- 4. Extragalactic gamma-ray sources.- 5. Non-thermal emission from early-type binaries.- 6. Gamma-ray emission from supernova remnants.- 7. Gamma-ray pulsars.- 8. Theories of gamma-ray emission from pulsars.- 9.
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From the contents:Preface.- 1. Introduction.- 2. Fundamentals of gamma-ray astrophysics.- 3. Galactic gamma-ray sources.- 4. Extragalactic gamma-ray sources.- 5. Non-thermal emission from early-type binaries.- 6. Gamma-ray emission from supernova remnants.- 7. Gamma-ray pulsars.- 8. Theories of gamma-ray emission from pulsars.- 9.
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Possible episodic gamma-ray sources
Space Science Reviews, 1996F. A. Aharonian, A. M. Atoyan
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