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A strong magnetic field in the jet base of a supermassive black hole

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arxiv 1604.01898 v1 pith:6OTPQKKN submitted 2016-04-07 astro-ph.HE astro-ph.GAastro-ph.IM

Ivan Marti-Vidal , Sebastien Muller , Wouter Vlemmings , Cathy Horellou , Susanne Aalto This is my paper
classification astro-ph.HEastro-ph.GAastro-ph.IM
keywords magneticrotationblackholefaradayfieldfieldsalong
verification ladder T0 review T1 audit T2 compute T3 formal
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Active galactic nuclei (AGN) host some of the most energetic phenomena in the Universe. AGN are thought to be powered by accretion of matter onto a rotating disk that surrounds a supermassive black hole. Jet streams can be boosted in energy near the event horizon of the black hole and then flow outward along the rotation axis of the disk. The mechanism that forms such a jet and guides it over scales from a few light-days up to millions of light-years remains uncertain, but magnetic fields are thought to play a critical role. Using the Atacama large mm/submm array (ALMA), we have detected a polarization signal (Faraday rotation) related to the strong magnetic field at the jet base of a distant AGN, PKS1830-211. The amount of Faraday rotation (rotation measure) is proportional to the magnetic field strength along the line of sight times the density of electrons. Although it is impossible to precisely infer the magnetic fields in the region of Faraday rotation, the high rotation measures derived suggest magnetic fields of at least tens of Gauss (and possibly considerably higher) on scales of the order of light days (0.01 pc) from the black hole.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The emergence of X-ray emission lines during relativistic radio-jet formation in the changing-look active galactic nucleus 1ES 1927+654

    astro-ph.HE 2026-07 conditional novelty 6.0 of 10

    X-ray emission lines and a broad iron feature emerged in changing-look AGN 1ES 1927+654 concurrently with radio-jet formation and declining ionized outflows from 2022 to 2025.

  2. Magnetic field and plasma number density from radio and millimeter core measurements in AGN jets

    astro-ph.HE 2026-06 unverdicted novelty 5.0 of 10

    Derives B*(d) and N*(d) for AGN jet cores from self-absorbed synchrotron emission model with power-law assumptions on Doppler factor, Lorentz factor, B, and N versus jet width d.

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