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

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

研究成果: ジャーナルへの寄稿学術誌査読

39 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)L1-L4
ジャーナルPublications of the Astronomical Society of Japan
52
1
DOI
出版ステータス出版済み - 2000
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 天文学と天体物理学
  • 宇宙惑星科学

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