%0 Unpublished work
%T Radiation processes around accreting black holes
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%A Belmont, R.
%A Malzac, J.
%A Marcowith, Alexandre
%Z SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes and R. Samadi. Available online at http://proc.sf2a.asso.fr, p.171
%Z 08-094
%8 2008-10-31
%D 2008
%Z 0810.5640
%Z Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Preprints, Working Papers, ...
%X Accreting sources such as AGN, X-ray binaries or gamma-ray bursts are knownto be strong, high energy emitters. The hard emission is though to originatefrom plasmas of thermal and/or non-thermal high energy particles. Not only doesthis emission allow to probe the unique properties of the matter in an extremeenvironment, but it also has a crucial backreaction on the energetics and thedynamics of the emitting medium itself. Understanding interactions betweenradiation and matter has become a key issue in the modelling of high energysources. Although most cross sections are well known, they are quite complexand the way all processes couple non-linearly is still an open issue. We present a new code that solves the local, kinetic evolution equations fordistributions of electrons, positrons and photons, interacting by radiationprocesses such as self-absorbed synchrotron and brems-strahlung radiation,Compton scattering, pair production/annihilation, and by Coulomb collisions.The code is very general and aimed to modelled various high energy sources. Asan application, we study the spectral states of X-ray binaries, includingthermalization by Coulomb collisions and synchrotron self-absorption. It isfound that the low-hard and high-soft states can be modelled with differentillumination but the same non-thermal acceleration mechanism.
%G English
%L hal-00430326
%U https://hal.science/hal-00430326
%~ IN2P3
%~ LPTA
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2