ORBi: Payez Alexandre - Axion-like particles and circular polarisation of active galactic nuclei

Reference : Axion-like particles and circular polarisation of active galactic nuclei


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/65247

Title :	Axion-like particles and circular polarisation of active galactic nuclei
Language :	English
Author, co-author :	Payez, Alexandre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique >]
	Cudell, Jean-René [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique >]
	Hutsemekers, Damien [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Publication date :	2010
Main document 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
Pages :	133-136
On invitation :	No
Audience :	International
ISBN :	978-3-935702-37-9
City :	Hamburg
Country :	Germany
Event name :	5th Patras Workshop on Axions, WIMPs and WISPs PATRAS 2009
Event date :	Jul 13-17, 2009
Event organizer :	Durham University
Event place (city) :	Durham
Event country :	United Kingdom
Keywords :	[en] 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.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/65247
Other URL :	http://www-library.desy.de/confprocs.html

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