Particle Heating by Nonlinear Alfvénic Turbulence in Advection-dominated Accretion Flows

Details Particle Heating by Nonlinear Alfvénic Turbulence in Advection-dominated Accretion Flows Particle Heating by Nonlinear Alfvénic Turbulence in Advection-dominated Accretion Flows

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...541..811m&link_type=abstract

The Astrophysical Journal, Volume 541, Issue 2, pp. 811-820.

Astronomy and Astrophysics

Astronomy

17

Accretion, Accretion Disks, Magnetohydrodynamics: Mhd, Plasmas, Turbulence, Waves

Scientific paper

Particle heating in advection-dominated accretion flows (ADAFs) by nonlinear MHD (Alfvénic) turbulence is investigated. Such turbulence with highly fluctuating magnetic fields, B~B0, is believed to be naturally produced by the magnetic shearing instability near the nonlinear saturation. It is shown that the energy is dissipated in the parallel cascade, which occurs because of nonlinear compressibility of high-amplitude turbulence and predominantly heats protons but not electrons. The conservative limit on the electron-to-proton heating fraction is δ<~a few times 10-2.

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