Magnetic-tower jet solution for launching astrophysical jets - The formation of the first jets in the universe

被引:18
作者
Kato, Yoshiaki [1 ]
机构
[1] Univ Tsukuba, Tsukuba, Ibaraki 3058577, Japan
关键词
accretion; accretion disks; black hole physics; ISM : jets and outflows; MHD; relativity;
D O I
10.1007/s10509-006-9220-y
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In spite of the large number of global three-dimensional (3-D) magnetohydrodynamic (MHD) simulations of accretion disks and astrophysical jets, which have been developed since 2000, the launching mechanisms of jets is somewhat controversial. Previous studies of jets have concentrated on the effect of the large-scale magnetic fields permeating accretion disks. However, the existence of such global magnetic fields is not evident in various astrophysical objects, and their origin is not well understood. Thus, we study the effect of small-scale magnetic fields confined within the accretion disk. We review our recent findings on the formation of jets in dynamo-active accretion disks by using 3-D MHD simulations. In our simulations, we found the emergence of accumulated azimuthal magnetic fields from the inner region of the disk (the so-called magnetic tower) and also the formation of a jet accelerated by the magnetic pressure of the tower. Our results indicate that the magnetic tower jet is one of the most promising mechanisms for launching jets from the magnetized accretion disk in various astrophysical objects. We will discuss the formation of cosmic jets in the context of the magnetic tower model.
引用
收藏
页码:11 / 15
页数:5
相关论文
共 68 条
[1]   Enhanced angular momentum transport in accretion disks [J].
Balbus, SA .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 2003, 41 :555-597
[2]   A POWERFUL LOCAL SHEAR INSTABILITY IN WEAKLY MAGNETIZED DISKS .1. LINEAR-ANALYSIS [J].
BALBUS, SA ;
HAWLEY, JF .
ASTROPHYSICAL JOURNAL, 1991, 376 (01) :214-222
[3]   HYDROMAGNETIC FLOWS FROM ACCRETION DISKS AND THE PRODUCTION OF RADIO JETS [J].
BLANDFORD, RD ;
PAYNE, DG .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1982, 199 (03) :883-903
[4]   Radiatively inefficient magnetohydrodynamic accretion-ejection structures [J].
Casse, F ;
Keppens, R .
ASTROPHYSICAL JOURNAL, 2004, 601 (01) :90-103
[5]   Magnetized accretion-ejection structures: 2.5-dimensional magnetohydrodynamic simulations of continuous ideal jet launching from resistive accretion disks [J].
Casse, F ;
Keppens, R .
ASTROPHYSICAL JOURNAL, 2002, 581 (02) :988-1001
[6]   A SIMPLE TYPE OF MAGNETICALLY DRIVEN JETS - AN ASTROPHYSICAL PLASMA GUN [J].
CONTOPOULOS, J .
ASTROPHYSICAL JOURNAL, 1995, 450 (02) :616-627
[7]   Magnetically driven accretion in the Kerr metric. III. Unbound outflows [J].
De Villiers, JP ;
Hawley, JF ;
Krolik, JH ;
Hirose, S .
ASTROPHYSICAL JOURNAL, 2005, 620 (02) :878-888
[8]   Magnetically driven accretion flows in the Kerr metric. I. Models and overall structure [J].
De Villiers, JP ;
Hawley, JF ;
Krolik, JH .
ASTROPHYSICAL JOURNAL, 2003, 599 (02) :1238-1253
[9]  
Fendt C, 1999, ASTRON ASTROPHYS, V349, pL61
[10]  
FUKUE J, 1991, PUBL ASTRON SOC JPN, V43, P131