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Titlebook: High Energy Astrophysics; An Introduction Thierry J.-L. Courvoisier Book 2013 Springer-Verlag Berlin Heidelberg 2013 AGN.Accretion disks.As

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书目名称High Energy Astrophysics
副标题An Introduction
编辑Thierry J.-L. Courvoisier
视频video
概述Based on observational examples this book reveals and explains high-energy astrophysical processes.Presents the theory of astrophysical processes in a didactic approach by deriving equations step by s
丛书名称Astronomy and Astrophysics Library
图书封面Titlebook: High Energy Astrophysics; An Introduction Thierry J.-L. Courvoisier Book 2013 Springer-Verlag Berlin Heidelberg 2013 AGN.Accretion disks.As
描述.High-energy astrophysics has unveiled a Universe very different from that only known from optical observations. It has revealed many types of objects in which typical variability timescales are as short as years, months, days, and hours (in quasars, X-ray binaries, etc), and even down to milli-seconds in gamma ray bursts. The sources of energy that are encountered are only very seldom nuclear fusion, and most of the time gravitation, a paradox when one thinks that gravitation is, by many orders of magnitude, the weakest of the fundamental interactions. The understanding of these objects‘ physical conditions and the processes revealed by high-energy astrophysics in the last decades is nowadays part of astrophysicists‘ culture, even of those active in other domains of astronomy..This book evolved from lectures given to master and PhD students at the University of Geneva since the early 1990s. It aims at providing astronomers and physicists intending to be active in high-energy astrophysics a broad basis on which they should be able to build the more specific knowledge they will need. While in the first part of the book the physical processes are described and derived in detail, the
出版日期Book 2013
关键词AGN; Accretion disks; Astrophysical radiation processes; Bremsstrahlung; Compton emission; Cosmic Rays; Ga
版次1
doihttps://doi.org/10.1007/978-3-642-30970-0
isbn_softcover978-3-642-43684-0
isbn_ebook978-3-642-30970-0Series ISSN 0941-7834 Series E-ISSN 2196-9698
issn_series 0941-7834
copyrightSpringer-Verlag Berlin Heidelberg 2013
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Cyclotron Line Emission>The force acting on a charge . moving non-relativistically with a velocity . of magnitude v in a uniform magnetic field . is the Lorentz force.
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Synchrotron EmissionOne speaks of cyclotron radiation when the electrons moving in a magnetic field are not relativistic, and of synchrotron radiation when the particle energies are relativistic.
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Pair ProcessesA further form of interaction between photons and electrons is the creation and annihilation of electron–positron pairs. These processes are important at energies above the electron rest mass of 511 keV.
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Particle AccelerationWe have seen in the discussion of synchrotron radiation that there are high energy electrons in different environments in nature. One also knows since the beginning of the twentieth century that there is a “penetrating” radiation that comes from outer space and that is measurable on the ground.
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Black Holes and Accretion EfficiencyIn general relativity one does not discuss a gravitational field, but one considers instead the way in which matter influences the geometry of space-time. Geometry is described by a metric, the way of measuring distances between two events in space-time.
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