Reference : Can axionlike particles explain the alignments of the polarizations of light from quasars?
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/95422
Can axionlike particles explain the alignments of the polarizations of light from quasars?
English
Payez, Alexandre mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique >]
Cudell, Jean-René mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique >]
Hutsemekers, Damien mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
25-Oct-2011
Physical Review. D : Particles and Fields
American Physical Society
84
085029, pp. 1-17
Yes (verified by ORBi)
International
1550-7998
1550-2368
College Park
MD
[en] axion ; polarisation ; quasar ; large-scale ; alignment ; wave-packet
[en] The standard axion-like particle explanation of the observed large-scale coherent orientations of quasar polarisation vectors is ruled out by the recent measurements of vanishing of circular polarisation.
We introduce a more general wave-packet formalism and show that, although decoherence effects between waves of different frequencies can reduce significantly the amount of circular polarisation, the axion-like particle hypothesis is disfavoured given the bandwidth with which part of the observations were performed.
Finally, we show that a more sophisticated model of extragalactic fields does not lead to an alignment of polarisations.
Researchers ; Professionals
http://hdl.handle.net/2268/95422
10.1103/PhysRevD.84.085029

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