Evidence of energy nonequipartition between particles and fields in lobes of the radio galaxy PKS 1343-601 (centaurus B)

M. Tashiro, H. Kaneda, K. Makishima, N. Iyomoto, E. Idesawa, Y. Ishisaki, T. Kotani, T. Takahashi, A. Yamashita

研究成果: ジャーナルへの寄稿学術誌査読

65 被引用数 (Scopus)

抄録

We observed the radio galaxy PKS 1343 -601 (Centaurus B) in X-rays with ASCA and discovered diffuse hard X-ray emission from its radio lobe region. The obtained flux and spectrum strongly suggest that the X-rays are produced via an inverse-Compton (IC) process, in which the cosmic microwave back ground photons are boosted up to X-rays by synchrotron electrons. This is the second case, following the case of Fornax A, of the detection of the IC X-rays from radio lobes. The observed X-ray emission is brighter than expected in the case of minimum energy density, indicating particle-dominated lobes. Com parison of the X-ray and radio images reveals an outward increase in the magnetic energy density. This infers a gradual compression of magnetic fields toward the edge of the lobes.

本文言語英語
ページ(範囲)713-718
ページ数6
ジャーナルAstrophysical Journal
499
2 PART I
DOI
出版ステータス出版済み - 1998
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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