Dynamically important magnetic fields near accreting supermassive black holes

M. Zamaninasab, E. Clausen-Brown, T. Savolainen, A. Tchekhovskoy

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

153 Sitaatiot (Scopus)

Abstrakti

Accreting supermassive black holes at the centres of active galaxies often produce `jets'--collimated bipolar outflows of relativisticparticles. Magnetic fields probably play a critical role in jetformation and in accretion disk physics. A dynamically important magnetic field was recently found near the Galactic Centre black hole. If this is common and if the field continues to near the black hole event horizon, disk structures will be affected, invalidating assumptions made in standard models. Here we report that jet magnetic field and accretion disk luminosity are tightly correlated over seven orders of magnitude for a sample of 76 radio-loud active galaxies. We conclude that the jet-launching regions of these radio-loud galaxies are threaded by dynamically important fields, which will affect the disk properties. These fields obstruct gas infall, compress the accretion disk vertically, slow down the disk rotation by carrying away its angular momentum in an outflow and determine the directionality of jets.
AlkuperäiskieliEnglanti
Sivut126-128
Sivumäärä9
JulkaisuNature
Vuosikerta510
Numero7503
DOI - pysyväislinkit
TilaJulkaistu - 4 kesäkuuta 2014
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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