Axion-like particles and circular polarisation of active galactic nuclei

Payez, Alexandre; Cudell, Jean-René; Hutsemekers, Damien

Paper published in a book (Scientific congresses and symposiums)

Payez, Alexandre; Cudell, Jean-René; Hutsemekers, Damien

2010 • In 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

Additional URL :

http://www-library.desy.de/confprocs.html

Available on ORBi :

since 03 July 2010

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Bibliography

A. Payez et al., in preparation.
D. Hutsemékers, talk presented at the 2nd Joint ILIAS-CAST-CERN Axion Training Workshop, 2006
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C. Burrage, A.C. Davis and D.J. Shaw, Phys. Rev D 79 044028 (2009).
A. Payez, J.R. Cudell and D. Hutsemékers, AIP Conf. Proc. 1038 211 (2008) [arXiv:0805.3946].
D. Hutsemékers et al., in preparation.
J.P. Vallée, Astron. J. 99 459 (1990).