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Title: Electron Acceleration and Time Variability of High-Energy Emission from Blazars

Abstract

Blazars are known to emit a broadband emission from radio to gamma rays with rapid time variations, particularly in X-rays and gamma rays. Synchrotron radiation and inverse Compton scattering are thought to play an important role in emission, and the time variations are likely related to the acceleration of nonthermal electrons. As simultaneous multiwavelength observations with continuous time spans have been recently available, some characteristics of electron acceleration can possibly be inferred from the spectral changes of high-energy emission. In order to make such inferences, we solve the time-dependent kinetic equations of electrons and photons simultaneously, using a simple model for electron acceleration. We then show how the time variations of emission are dependent on electron acceleration. We also present a simple model for a flare in X-rays and TeV gamma rays by temporarily changing the acceleration timescale. Our model can be used to analyze observed data in detail to obtain information on electron acceleration in blazars. (c) 2000 The American Astronomical Society.

Authors:
; ;
Publication Date:
OSTI Identifier:
20217585
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 536; Journal Issue: 1; Other Information: PBD: 10 Jun 2000; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BL LACERTAE OBJECTS; EMISSION SPECTRA; SYNCHROTRON RADIATION; COMPTON EFFECT; ELECTRON SPECTRA; ACCELERATION; MATHEMATICAL MODELS; GAMMA SPECTRA; THEORETICAL DATA

Citation Formats

Kusunose, Masaaki, Takahara, Fumio, and Li, Hui. Electron Acceleration and Time Variability of High-Energy Emission from Blazars. United States: N. p., 2000. Web. doi:10.1086/308928.
Kusunose, Masaaki, Takahara, Fumio, & Li, Hui. Electron Acceleration and Time Variability of High-Energy Emission from Blazars. United States. doi:10.1086/308928.
Kusunose, Masaaki, Takahara, Fumio, and Li, Hui. Sat . "Electron Acceleration and Time Variability of High-Energy Emission from Blazars". United States. doi:10.1086/308928.
@article{osti_20217585,
title = {Electron Acceleration and Time Variability of High-Energy Emission from Blazars},
author = {Kusunose, Masaaki and Takahara, Fumio and Li, Hui},
abstractNote = {Blazars are known to emit a broadband emission from radio to gamma rays with rapid time variations, particularly in X-rays and gamma rays. Synchrotron radiation and inverse Compton scattering are thought to play an important role in emission, and the time variations are likely related to the acceleration of nonthermal electrons. As simultaneous multiwavelength observations with continuous time spans have been recently available, some characteristics of electron acceleration can possibly be inferred from the spectral changes of high-energy emission. In order to make such inferences, we solve the time-dependent kinetic equations of electrons and photons simultaneously, using a simple model for electron acceleration. We then show how the time variations of emission are dependent on electron acceleration. We also present a simple model for a flare in X-rays and TeV gamma rays by temporarily changing the acceleration timescale. Our model can be used to analyze observed data in detail to obtain information on electron acceleration in blazars. (c) 2000 The American Astronomical Society.},
doi = {10.1086/308928},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 536,
place = {United States},
year = {2000},
month = {6}
}