Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-03-19
Plas. Fus. Res., 4, 017 (2009)
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
8 pages, 2 figures. Minor revision, published version: Proc 14th International Congress on Plasma Physics, Fukuoka, Japan, Sep
Scientific paper
10.1585/pfr.4.017
Astrophysical accretion is arguably the most prevalent physical process in the Universe; it occurs during the birth and death of individual stars and plays a pivotal role in the evolution of entire galaxies. Accretion onto a black hole, in particular, is also the most efficient mechanism known in nature, converting up to 40% of accreting rest mass energy into spectacular forms such as high-energy (X-ray and gamma-ray) emission and relativistic jets. Whilst magnetic fields are thought to be ultimately responsible for these phenomena, our understanding of the microphysics of MHD turbulence in accretion flows as well as large-scale MHD outflows remains far from complete. We present a new theoretical model for astrophysical disk accretion which considers enhanced vertical transport of momentum and energy by MHD winds and jets, as well as transport resulting from MHD turbulence. We also describe new global, 3D simulations that we are currently developing to investigate the extent to which non-ideal MHD effects may explain how small-scale, turbulent fields (generated by the magnetorotational instability -- MRI) might evolve into large-scale, ordered fields that produce a magnetized corona and/or jets where the highest energy phenomena necessarily originate.
Bicknell Geoffrey V.
Dobbie Peter B.
Kuncic Zdenka
Salmeron Raquel
No associations
LandOfFree
Enhanced MHD transport in astrophysical accretion flows: turbulence, winds and jets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Enhanced MHD transport in astrophysical accretion flows: turbulence, winds and jets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced MHD transport in astrophysical accretion flows: turbulence, winds and jets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-648253