X‐ray and γ‐ray emission from channeled relativistic electrons and positrons

1977 ◽  
Vol 30 (6) ◽  
pp. 265-268 ◽  
Author(s):  
R. W. Terhune ◽  
R. H. Pantell
Keyword(s):  
Relativistic Electrons ◽  
X Ray ◽  
Electrons And Positrons ◽  
Γ Ray

scholarly journals On the Broad Band Energy Distribution of Blazars

1994 ◽  
Vol 159 ◽  
pp. 221-232
Author(s):  
Laura Maraschi ◽  
Gabriele Ghisellini ◽  
Annalisa Celotti
Keyword(s):  
Spectral Component ◽  
Broad Band ◽  
Relativistic Electrons ◽  
Band Energy ◽  
X Ray ◽  
Inverse Compton Scattering ◽  
Inverse Compton ◽  
Γ Rays ◽  
Γ Ray ◽  
Main Components

The broad band energy distributions of blazars are revisited with particular emphasis on the sources detected in γ-rays by the Compton Observatory (GRO). The observed distributions can be broken down into two main components, corresponding to two broad peaks in the vFv representation. The first occurs in the FIR-optical range, the second in the MeV-GeV region. In the case of MKN 421, which may be representative of X-ray selected BL Lacs, the first peak is shifted to higher frequency (≃ 1016 Hz) and the γ-ray spectrum extends to TeV energies. There is general agreement that the first spectral component is due to synchrotron radiation from a relativistic jet, although some problems remain in deriving the spectrum and location of the emitting relativistic electrons. The second component, which in most objects extends from the X-ray to the γ-ray range, can be naturally interpreted as inverse Compton scattering by the same electrons producing the synchrotron photons, either on the synchrotron photons themselves (SSC) or on photons external to the jet. It is argued that multifrequency studies of these sources including γ-rays will allow to test Inverse Compton models and to distinguish between different sources of photons.

scholarly journals Gamma-Rays from Active Galactic Nuclei

1983 ◽  
Vol 6 ◽  
pp. 505-510
Author(s):  
M. Kafatos
Keyword(s):  
Active Galactic Nuclei ◽  
Accretion Disks ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
Thermal Processes ◽  
Relativistic Electrons ◽  
Massive Black Holes ◽  
X Ray ◽  
Electrons And Positrons ◽  
Γ Rays

Gamma-ray observations from active galactic nuclei (AGN) are important in trying to understand the nature of their central sources. A handful of mechanisms can give rise to γ-rays either from nonthermal or from thermal processes. Hot accretion disks around massive black holes in the centers of AGN could provide the required thermal electrons, pions and relativistic electrons and positrons to explain both the X-ray and γ-ray emission.

scholarly journals On the use of X-ray and γ-ray telescopes for identifying the origin of electrons and positrons observed by ATIC, Fermi, and PAMELA

2011 ◽  
Vol 35 (4) ◽  
pp. 185-191 ◽  
Author(s):  
Antoine Calvez ◽  
Warren Essey ◽  
Malcolm Fairbairn ◽  
Alexander Kusenko ◽  
Michael Loewenstein
Keyword(s):  
X Ray ◽  
Electrons And Positrons ◽  
Γ Ray

scholarly journals Comptonization as Blazar High Energy Emission

1996 ◽  
Vol 175 ◽  
pp. 421-422 ◽  
Author(s):  
Oliver Dreissigacker
Keyword(s):  
Particle Acceleration ◽  
Gamma Ray ◽  
High Energy ◽  
Energy Output ◽  
Relativistic Electrons ◽  
X Ray ◽  
Γ Ray ◽  
Exotic Particle ◽  
Jet Plasma ◽  
High Energy Emission

We explain the overall continuous Grazar (Gamma Ray Blazar) spectrum from the synchrotron turnover to the EGRET GeV detections by means of Comptonization in the parsec scale jet's substructures.While making use of the constraints on the synchrotron spectrum and other measurable quantities, no exotic particle acceleration is needed to achieve the high energy output.We show, that the “Lighthouse Model” of blobs of relativistic electrons, travelling with the jet plasma at relativistic speeds, produce both, correct timescales and shapes for the lightcurve, and correct ratios and slopes of the synchrotron, X-ray and γ-ray branches.

X-ray or γ-ray leukemogenesis at Hiroshima and Nagasaki

1988 ◽  
Vol 26 (3) ◽  
pp. 161-164 ◽  
Author(s):  
Philip Rosen
Keyword(s):  
X Ray ◽  
Γ Ray

X-ray and γ-ray emission from the PSR B1259-63/Be star system

2004 ◽  
Vol 33 (4) ◽  
pp. 601-604 ◽  
Author(s):  
K. Murata ◽  
H. Tamaki ◽  
H. Maki ◽  
N. Shibazaki
Keyword(s):  
Star System ◽  
X Ray ◽  
Be Star ◽  
Γ Ray

Study of X-ray and γ-ray flare from Mkn-421 during February 2010 using Swift and Fermi observations

New Astronomy ◽  
2012 ◽  
Vol 17 (8) ◽  
pp. 679-686 ◽  
Author(s):  
K.K. Singh ◽  
S. Bhattacharyya ◽  
N. Bhatt ◽  
A.K. Tickoo
Keyword(s):  
X Ray ◽  
Γ Ray
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