Abstract
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 less than or similar to 10(-12) GeV-1 for masses between similar to 5 x 10(-23) eV and similar to 1.2 x 10(-21) eV.
Original language | English |
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Article number | 059 |
Number of pages | 23 |
Journal | Journal of Cosmology and Astroparticle Physics |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 2019 |
MoE publication type | A1 Journal article-refereed |
Keywords
- particle physics
- cosmology connection
- cosmology of theories beyond the SM
- GALACTIC NUCLEI
- LINEAR-POLARIZATION
- FIELD OSCILLATIONS
- VLBA EXPERIMENTS
- MOJAVE
- BIREFRINGENCE
- ALPS
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Metsähovi Radio Observatory
Tammi, J. (Manager)
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