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Axion-like particles and circular polarisation of active galactic nuclei
Payez, Alexandre; Cudell, Jean-René; Hutsemekers, Damien
2010In Jaeckel, Joerg; Lindner, Axel; Redondo, Javier (Eds.) Proceedings of the 5th Patras Workshop on Axions, WIMPs and WISPs PATRAS 2009
 

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Keywords :
polarisation; quasar; axion
Abstract :
[en] The measurements of the linear polarisation of visible light from quasars give strong evidence for large-scale coherent orientations of their polarisation vectors in some regions of the sky. We show that these observations can be explained by the mixing of the photons with very light pseudoscalar (axion-like) particles in extragalactic magnetic fields during their propagation. We present a new treatment in terms of wave packets and discuss the circular polarisation.
Disciplines :
Space science, astronomy & astrophysics
Physics
Author, co-author :
Payez, Alexandre ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique
Cudell, Jean-René  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique
Hutsemekers, Damien ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
Axion-like particles and circular polarisation of active galactic nuclei
Publication date :
2010
Event name :
5th Patras Workshop on Axions, WIMPs and WISPs PATRAS 2009
Event organizer :
Durham University
Event place :
Durham, United Kingdom
Event date :
Jul 13-17, 2009
Audience :
International
Main work title :
Proceedings of the 5th Patras Workshop on Axions, WIMPs and WISPs PATRAS 2009
Editor :
Jaeckel, Joerg
Lindner, Axel
Redondo, Javier
Publisher :
Verlag Deutsches Elektronen-Synchrotron, Hamburg, Germany
ISBN/EAN :
978-3-935702-37-9
Pages :
133-136
Available on ORBi :
since 03 July 2010

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