Dynamo-generated turbulence and outflows from accretion discs

被引：10

作者：

Brandenburg, A ^{[1
]}

机构：

[1] Univ Newcastle Upon Tyne, Dept Math, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

[2] NORDITA, DK-2100 Copenhagen O, Denmark

来源：

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2000年 / 358卷 / 1767期

关键词：

magnetic fields; Balbus-Hawley instability; magnetorotational instability; alpha effect; jets; galaxy clusters;

D O I：

10.1098/rsta.2000.0557

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Local hydromagnetic simulations of accretion-disc turbulence currently provide the most convincing evidence that the origin of turbulence in discs could be the Balbus-Hawley magnetorotational instability. The main results of such calculations are highlighted with particular emphasis on the generation of large-scale magnetic fields. Comparison with mean-field dynamo theory is made. This theory is then used to address the question of the launching and collimation of winds emanating from the disc surfaces.

引用

页码：759 / 774

页数：16

共 36 条

[31]

Sokoloff D.D, 1983, MAGNETIC FIELDS ASTR

[32] Three-dimensional magnetohydrodynamical simulations of vertically stratified accretion disks [J].

Stone, JM ;

Hawley, JF ;

Gammie, CF ;

Balbus, SA .

ASTROPHYSICAL JOURNAL, 1996, 463 (02) :656-673

[33] Magnetocentrifugally driven winds: Comparison of MHD simulations with theory [J].

Ustyugova, GV ;

Koldoba, AV ;

Romanova, MM ;

Chechetkin, VM ;

Lovelace, RVE .

ASTROPHYSICAL JOURNAL, 1999, 516 (01) :221-235

[34]

VAINSHTEIN SI, 1972, SOV PHYS JETP-USSR, V34, P327

[35] An incoherent alpha-Omega dynamo in accretion disks [J].

Vishniac, ET ;

Brandenburg, A .

ASTROPHYSICAL JOURNAL, 1997, 475 (01) :263-274

[36] Clusters of galaxies:: magnetic fields and nonthermal emission [J].

Völk, HJ ;

Atoyan, AM .

ASTROPARTICLE PHYSICS, 1999, 11 (1-2) :73-82

← 1 2 3 4 →