Turbulence and Particle Heating in Advection‐dominated Accretion Flows | Zendy

Eliot Quataert | Zendy; Andrei Gruzinov | Zendy

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Turbulence and Particle Heating in Advection‐dominated Accretion Flows

Author(s) -

Eliot Quataert,

Andrei Gruzinov

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/307423

Subject(s) - advection , physics , turbulence , gyroradius , electron , magnetic reconnection , magnetic field , whistler , equipartition theorem , proton , accretion (finance) , computational physics , radius , astrophysics , atomic physics , mechanics , nuclear physics , quantum mechanics , computer security , computer science , thermodynamics

We extend and reconcile recent work on turbulence and particle heating inadvection-dominated accretion flows. For approximately equipartition magneticfields, the turbulence primarily heats the electrons. For weaker magneticfields, the protons are primarily heated. The division between electron andproton heating occurs between $\beta \sim 5$ and $\beta \sim 100$ (where$\beta$ is the ratio of the gas to the magnetic pressure), depending on unknowndetails of how Alfv\'en waves are converted into whistlers on scales of theproton Larmor radius. We also discuss the possibility that magneticreconnection could be a significant source of electron heating.Comment: 17 pages (Latex), incl. 2 Figures; submitted to Ap

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