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Constraining the photon coupling of ultra-light dark-matter axion-like particles by polarization variations of parsec-scale jets in active galaxies

Dark matter may consist of axion-like particles with ultra-low masses. Two-photon interactions of these particles affect the polarization of radiation propagating through the dark matter. Coherent oscillations of the Bose condensate of the particles induce periodic changes in the plane of polarisati...

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Published in:Journal of cosmology and astroparticle physics 2019-02, Vol.2019 (2), p.59-59
Main Authors: Ivanov, M.M., Kovalev, Y.Y., Lister, M.L., Panin, A.G., Pushkarev, A.B., Savolainen, T., Troitsky, S.V.
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container_title Journal of cosmology and astroparticle physics
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creator Ivanov, M.M.
Kovalev, Y.Y.
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description Dark matter may consist of axion-like particles with ultra-low masses. Two-photon interactions of these particles affect the polarization of radiation propagating through the dark matter. Coherent oscillations of the Bose condensate of the particles induce periodic changes in the plane of polarisation of emission passing through the condensate. We estimate this effect and analyze MOJAVE VLBA polarization observations of bright downstream features in the parsec-scale jets of active galaxies. Through the non-observation of periodic changes in the polarization angle, we are able to constrain the photon coupling of the ultra-light dark-matter axion-like particles at the level of ≲10−12 GeV−1 for masses between ∼5×10−23 eV and ∼1.2×10−21 eV.
doi_str_mv 10.1088/1475-7516/2019/02/059
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subjects Active galaxies
Condensates
Coupling
Dark matter
Downstream effects
Emission analysis
Particulates
Photons
Polarization
Radiation
title Constraining the photon coupling of ultra-light dark-matter axion-like particles by polarization variations of parsec-scale jets in active galaxies
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