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Title:
Hydromagnetic flows from accretion discs and the production of radio jets
Authors:
Blandford, R. D.; Payne, D. G.
Affiliation:
AA(California Institute of Technology, Pasadena, CA), AB(California Institute of Technology, Pasadena, CA)
Publication:
Royal Astronomical Society, Monthly Notices, vol. 199, June 1982, p. 883-903. (MNRAS Homepage)
Publication Date:
06/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTROPHYSICS, ENERGY TRANSFER, MAGNETOHYDRODYNAMIC FLOW, MOMENTUM TRANSFER, RADIO JETS (ASTRONOMY), STELLAR MASS ACCRETION, ANGULAR MOMENTUM, BLACK HOLES (ASTRONOMY), CRITICAL POINT, DISKS (SHAPES), SOLAR CORONA
Comment:
A&AA ID. AAA031.062.123
Bibliographic Code:
1982MNRAS.199..883B

Abstract

The possibility is examined that angular momentum is removed magnetically from an accretion disk by field lines that leave the disk surface, and is eventually carried off in a jet moving perpendicular to the disk. The mechanism is illustrated by a self-similar MHD solution, with the gas being regarded as cold and starting from rest at the equatorial plane, with the disk itself in Keplerian orbit about a black hole. It is shown that a centrifugally driven outflow of matter from the disk is possible if the poloidal component of the magnetic field makes an angle of less than 60 deg with disk surface. At large distances the outflow forms a pair of collimated, antiparallel jets, while close to the disk it is probably driven by gas pressure in a hot, magnetically dominated corona.

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