Temporal 1/fα fluctuations from fractal magnetic fields in black-hole accretion flow
Temporal 1/fα fluctuations from fractal magnetic fields in black-hole accretion flow
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黑洞吸积流中分形磁场的时间 1/fα 涨落
DOI：
10.1093/pasj/52.1.l1
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发表时间：
1999
影响因子：
2.3
通讯作者：
K. Shibata
中科院分区：
文献类型：
--
作者：
T. Kawaguchi;S. Mineshige;M. Machida;R. Matsumoto;K. Shibata
频率依赖性为1/f ′（1/2）的快速波动是黑洞物体辐射的特征。它的起源仍然知之甚少。我们研究了三维磁流体动力学（MHD）模拟数据，发现磁化吸积盘既具有1/f ′涨落（δ ′ 2），又具有分形磁结构（分形维数D ′ 1.9）.分形场结构导致了具有各种释放能量和持续时间的重联事件，从而导致了重联事件的发生。
Rapid fluctuation with a frequency dependence of 1/f � (with � ' 1 2) is characteristic of radiation from black-hole objects. Its origin remains poorly understood. We examine the three-dimensional magnetohydrodynamical (MHD) simulation data, finding that a magnetized accretion disk exhibits both 1/f � fluctuation (with �'2) and a fractal magnetic structure (with the fractal dimension of D�1.9). The fractal field configuration leads reconnection events with a variety of released energy and of duration, thereby � / �