[en] The observation of redshift-dependent coherent orientations of quasar polarisation vectors over cosmological distances in some regions of the sky is reviewed. Based on a good-quality sample of 355 measured quasars, this observation seems to infer the existence of a new effect acting on light propagation on such huge distances. A solution in terms of nearly massless axion-like particles has been proposed in the literature and its current status is discussed.
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
Hutsemekers, Damien ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Cudell, Jean-René ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique
Language :
English
Title :
Large-scale coherent orientations of quasar polarisation vectors: interpretation in terms of axion-like particles
Publication date :
2010
Event name :
Axions 2010
Event organizer :
Guenakh Mitselmakher, Pierre Ramond, Neil Sullivan, David Tanner, Karl van Bibber
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