Probing axionlike particles with the ultraviolet photon polarization from active galactic nuclei in radio galaxies

Link:
Autor/in:
Erscheinungsjahr:
2012
Medientyp:
Text
Schlagworte:
  • Dark matter
  • Photons
  • Axion-like particles
  • Decay
  • Quarks
  • Neutrinos
  • Dark matter
  • Photons
  • Axion-like particles
  • Decay
  • Quarks
  • Neutrinos
Beschreibung:
  • The mixing of photons with axionlike particles (ALPs) in the large-scale magnetic field B induces a rotation in the polarization angle of a linearly polarized photon beam from active galactic nuclei in radio galaxies as it propagates over cosmological distances. Using available ultraviolet polarization data concerning these sources, we derive a new bound on the product of the photon-ALP coupling g aγ times B. We find g aγB 10 -11GeV -1nG for ultralight ALPs with m a 10 -15eV. We compare our new bound with the ones present in the literature and we comment about possible improvements with observations of more sources. © 2012 American Physical Society.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/f428298d-7669-41cb-abeb-e8d07e821057