Journal Article

PUBDB-2017-11454

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Plasma effects on relativistic pair beams from TeV blazars. PIC simulations and analytical predictions

Rafighi, I. (Corresponding author) ; Vafin, S. ; Pohl, M.DESY* ; Niemiec, J.

2017
EDP Sciences Les Ulis

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Please use a persistent id in citations: doi:10.1051/0004-6361/201731127  doi:10.3204/PUBDB-2017-11454

Abstract: Pair beams produced by very-high-energy radiation from TeV blazars emit gamma rays in the GeV band by inverse-Compton scattering of soft photons. The observed GeV-band signal is smaller than that expected from the full electromagnetic cascade. This means that the pair beams must be affected by other physical processes reducing their energy flux. One possible loss mechanism involves beam-plasma instabilities that we consider in the present work. For realistic parameters the pair beams cannot be simulated by modern computers. Instead, we use a simple analytical model to find a range of the beam parameters that (i) provides a physical picture similar to that of realistic pair beams and (ii) at the same time can be handled by available computational resources. Afterwards, we performed corresponding two-dimensional (2D) particle-in-cell (PIC) simulations. We confirm that the beams experience only small changes in the relevant parameter regime, and other processes such as deflection in magnetic field must be at play.

Note: (c) ESO

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Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF3-613) (POF3-613)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2017

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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