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

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)713-718
Number of pages6
JournalAstrophysical Journal
Volume499
Issue number2 PART I
DOIs
Publication statusPublished - 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Evidence of energy nonequipartition between particles and fields in lobes of the radio galaxy PKS 1343-601 (centaurus B)'. Together they form a unique fingerprint.

Cite this