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Integrated accretion disk angular momentum removal and astrophysical jet acceleration mechanism

Bellan, P. M. (2016) Integrated accretion disk angular momentum removal and astrophysical jet acceleration mechanism. Monthly Notices of the Royal Astronomical Society, 458 (4). pp. 4400-4421. ISSN 0035-8711. http://resolver.caltech.edu/CaltechAUTHORS:20160401-120018442

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Abstract

Ions and neutrals in the weakly ionized plasma of an accretion disc are tightly bound because of the high ion–neutral collision frequency. A cluster of a statistically large number of ions and neutrals behaves as a fluid element having the charge of the ions and the mass of the neutrals. This fluid element is effectively a metaparticle having such an extremely small charge-to-mass ratio that its cyclotron frequency can be of the order of the Kepler angular frequency. In this case, metaparticles with a critical charge-to-mass ratio can have zero canonical angular momentum. Zero canonical angular momentum metaparticles experience no centrifugal force and spiral inwards towards the central body. Accumulation of these inward spiralling metaparticles near the central body produces radially and axially outward electric fields. The axially outward electric field drives an out-of-plane poloidal electric current along arched poloidal flux surfaces in the highly ionized volume outside the disc. This out-of-plane current and its associated magnetic field produce forces that drive bidirectional astrophysical jets flowing normal to and away from the disc. The poloidal electric current circuit removes angular momentum from the accreting mass and deposits this removed angular momentum at near infinite radius in the disc plane. The disc region is an electric power source (E⋅J<0) while the jet region is an electric power sink (E⋅J>0).


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1093/mnras/stw562DOIArticle
https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stw562PublisherArticle
ORCID:
AuthorORCID
Bellan, P. M.0000-0002-0886-8782
Additional Information:© 2016 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2016 March 4. Received 2016 March 4. In original form 2015 March 16. First published online March 17, 2016. This material is based upon work supported by the U.S. Department of Energy Office of Science, Office of Fusion Energy Sciences under Award Numbers DE-FG02-04ER54755 and DE-SC0010471. The author wishes to thank an anonymous reviewer for pointing out that a range of particles with finite Pφ can have unstable circular orbits when β = 1 as demonstrated in Appendix A.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-04ER54755
Department of Energy (DOE)DE-SC0010471
Subject Keywords:accretion, accretion discs
Record Number:CaltechAUTHORS:20160401-120018442
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160401-120018442
Official Citation:P. M. Bellan Integrated accretion disc angular momentum removal and astrophysical jet acceleration mechanism MNRAS (June 01, 2016) Vol. 458 4400-4421 doi:10.1093/mnras/stw562 first published online March 17, 2016
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65853
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:01 Apr 2016 19:07
Last Modified:26 Apr 2018 17:23

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