TY - JOUR
T1 - Temporal 1/fα fluctuations from fractal magnetic fields in black-hole accretion flow
AU - Kawaguchi, Toshihiro
AU - Mineshige, Shin
AU - Machida, Mami
AU - Matsumoto, Ryoji
AU - Shibata, Kazunari
PY - 2000
Y1 - 2000
N2 - Rapid fluctuation with a frequency dependence of 1/fα (with α ≃ 1-2) is characteristic of radiation from black-hole objects. Its origin remains poorly understood. We examined three-dimensional magnetohydrodynamical simulation data, finding that a magnetized accretion disk exhibits both 1/fα fluctuation (with α ≃ 2) and a fractal magnetic structure (with the fractal dimension of D ∼ 1.9). The fractal field configuration leads to reconnection events with a variety of released energy and duration, thereby producing 1/fα fluctuations.
AB - Rapid fluctuation with a frequency dependence of 1/fα (with α ≃ 1-2) is characteristic of radiation from black-hole objects. Its origin remains poorly understood. We examined three-dimensional magnetohydrodynamical simulation data, finding that a magnetized accretion disk exhibits both 1/fα fluctuation (with α ≃ 2) and a fractal magnetic structure (with the fractal dimension of D ∼ 1.9). The fractal field configuration leads to reconnection events with a variety of released energy and duration, thereby producing 1/fα fluctuations.
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U2 - 10.1093/pasj/52.1.L1
DO - 10.1093/pasj/52.1.L1
M3 - Article
AN - SCOPUS:0002788584
VL - 52
SP - L1-L4
JO - Publication of the Astronomical Society of Japan
JF - Publication of the Astronomical Society of Japan
SN - 0004-6264
IS - 1
ER -