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Relation between winds and jets in radio-loud AGN

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arxiv 1903.11605 v1 pith:22EFEQK6 submitted 2019-03-27 astro-ph.HE astro-ph.GA

Relation between winds and jets in radio-loud AGN

classification astro-ph.HE astro-ph.GA
keywords windrelationradio-loudoutflowaccretiondiskionisedmagnetic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We investigate the relation between the two modes of outflow (wind and jet) in radio-loud active galactic nuclei (AGN). For this study we have carried out a systematic and homogeneous analysis of XMM-Newton spectra of a sample of 16 suitable radio-loud Seyfert-1 AGN. The ionised winds in these AGN are parameterised through high-resolution X-ray spectroscopy and photoionisation modelling. We discover a significant inverse correlation between the column density NH of the ionised wind and the radio-loudness parameter R of the jet. We explore different possible explanations for this NH-R relation and find that ionisation, inclination, and luminosity effects are unlikely to be responsible for the observed relation. We argue that the NH-R relation is rather a manifestation of the magnetic driving mechanism of the wind from the accretion disk. Change in the magnetic field configuration from toroidal to poloidal, powering either the wind or the jet mode of the outflow, is the most feasible explanation for the observed decline in the wind NH as the radio jet becomes stronger. Our findings provide evidence for a wind-jet bimodality in radio-loud AGN and shine new light on the link between these two modes of outflow. This has far-reaching consequences for the accretion disk structure and the wind ejection mechanism.

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Forward citations

Cited by 3 Pith papers

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