Temporal 1/fα fluctuations from fractal magnetic fields in black-hole accretion flow

Toshihiro Kawaguchi, Shin Mineshige, Mami Machida, Ryoji Matsumoto, Kazunari Shibata

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)L1-L4
JournalPublications of the Astronomical Society of Japan
Volume52
Issue number1
DOIs
Publication statusPublished - Jan 1 2000

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frequency dependence
fractals
accretion
magnetic field
magnetic fields
simulation
energy
data simulation
accretion disks
radiation
configurations

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Temporal 1/fα fluctuations from fractal magnetic fields in black-hole accretion flow. / Kawaguchi, Toshihiro; Mineshige, Shin; Machida, Mami; Matsumoto, Ryoji; Shibata, Kazunari.

In: Publications of the Astronomical Society of Japan, Vol. 52, No. 1, 01.01.2000, p. L1-L4.

Research output: Contribution to journalArticle

Kawaguchi, Toshihiro ; Mineshige, Shin ; Machida, Mami ; Matsumoto, Ryoji ; Shibata, Kazunari. / Temporal 1/fα fluctuations from fractal magnetic fields in black-hole accretion flow. In: Publications of the Astronomical Society of Japan. 2000 ; Vol. 52, No. 1. pp. L1-L4.
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