A study on radiative instabilities and particle acceleration in magnetized compact sources

Abstract

The present work focuses on two astrophysically important research sub-jects: (i) on the possible radiative instabilities in compact gamma-ray sourcesand (ii) on the afterglow emission from the most violent explosions in theuniverse, i.e. from Gamma-Ray Bursts (GRBs). The first subject, although of more theoretical interest, has important implications for astrophysical sources, such as Active Galactic Nuclei (AGN). Instead of studying the applications of radiative instabilities that were discovered in the past, we focused on one newly discovered radiative instability called ‘automatic γ-ray quenching’. First, we specified the conditions which enable the growth of the instability. For this, we studied using analytical methods the stability of the steady-state solutions that describe the following physical system: gamma-rays, that are emitted by some non-thermal radiation process, are being constantly injected into a spherical region that containsa tangled magnetic field, while at the sa ...
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Handle URL
http://hdl.handle.net/10442/hedi/33088
ND
33088
Alternative title
Μελέτη των ακτινοβολιακών ασταθειών και της επιτάχυνσης σωματιδίων σε συμπαγείς μαγνητισμένες πηγές
Author
Petropoulou, Maria of Dimitrios
Date
2013
Degree Grantor
National and Kapodistrian University of Athens
Committee members
Μαστιχιάδης Απόστολος
Βλαχάκης Νεκτάριος
Piran Tsvi
Τσίγκανος Κανάρης
Χατζηδημητρίου Δέσποινα
Κυλάφης Νικόλαος
Αποστολάτος Θεοχάρης
Discipline
Natural Sciences
Physical Sciences
Keywords
Astroparticle physics; Non-thermal radiation mechanisms; Active galactic nuclei; Gamma-ray bursts
Country
Greece
Language
Greek
Description
214 σ., im., tbls., fig., ch.
Rights and terms of use
Το έργο παρέχεται υπό τους όρους της δημόσιας άδειας του νομικού προσώπου Creative Commons Corporation:Creative Commons Αναφορά Δημιουργού 3.0 Ελλάδα

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