On the Origin of Radio-loudness in Active Galactic Nuclei Using Far-infrared Polarimetric Observations

The dichotomy between radio-loud (RL) and radio-quiet (RQ) active galactic nuclei (AGNs) is thought to be intrinsically related to radio jet production. This difference may be explained by the presence of a strong magnetic field ( B -field) that enhances, or is the cause of, the accretion activity a...

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Bibliographic Details
Published in:The Astrophysical journal 2023-07, Vol.951 (1), p.31
Main Authors: Lopez-Rodriguez, Enrique, Kishimoto, Makoto, Antonucci, Robert, Begelman, Mitchell C., Globus, Noemie, Blandford, Roger
Format: Article
Language:English
Subjects:
Active galactic nuclei
AGN host galaxies
Astrophysical dust processes
Astrophysics
Cores
Deposition
Dust
Dust emission
Electrons
Emission
Emission measurements
Extragalactic magnetic fields
Far infrared astronomy
Loudness
Magnetic fields
Magnetohydrodynamics
Nuclear fuels
Polarimetry
Polarization
Radio galaxies
Radio jets (astronomy)
Seyfert galaxies
Supermassive black holes
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Summary:The dichotomy between radio-loud (RL) and radio-quiet (RQ) active galactic nuclei (AGNs) is thought to be intrinsically related to radio jet production. This difference may be explained by the presence of a strong magnetic field ( B -field) that enhances, or is the cause of, the accretion activity and the jet power. Here we report the first evidence of an intrinsic difference in the polarized dust emission cores of four RL and five RQ obscured AGNs using 89 μ m polarization with SOFIA/HAWC+. We find that the thermal polarized emission increases with the nuclear radio-loudness, R 20 = L 5GHz / L 20 μ m . The dust emission cores of RL AGNs are measured to be polarized, ∼5%–11%, while RQ AGNs are unpolarized,
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/accb96