Viscosity‐driven Winds from Magnetized Accretion Disks | Zendy

Daizo Maruta | Zendy; Osamu Kaburaki | Zendy

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Viscosity‐driven Winds from Magnetized Accretion Disks

Author(s) -

Daizo Maruta,

Osamu Kaburaki

Publication year - 2003

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 - 10.1086/376402

Subject(s) - accretion (finance) , angular momentum , physics , viscosity , magnetic field , accretion disc , astrophysics , flow (mathematics) , intermediate polar , mechanics , astronomy , classical mechanics , stars , thermodynamics , quantum mechanics , white dwarf

We present an analytic model in which an inefficiently radiating accretiondisk drives upward wind from its surfaces. The accretion process is controlledsimultaneously by a global magnetic field penetrating the disk and by aviscosity of the accreting plasma. It is shown that energy is transportedradially outward within the accreting flow, associated with the viscousangular-momentum transport in the same direction, and that this addition ofenergy from the inner part to the disk part makes the latter possible to drivean upward wind. The parameter that specifies the strength of a wind isdetermined uniquely in terms of a naturally introduced viscosity parameter.Comment: accepted for publication in Ap

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