The electron and magnetic field energies in the east lobe of the radio galaxy fornax a, measured with XMM-Newton

N. Isobe, K. Makishima, M. Tashiro, K. Ito, Naoko Iyomoto, H. Kaneda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In an XMM-Newton observation of the east lobe of nearby radio galaxy Fonrax A, we have significantly detected the diffuse X-ray emission, which was originally discovered by ASCA and ROSAT. The X-ray spectrum of the diffuse emission is described by a single power-law model, modified with the Galactic absorption toward the object. The best-fit X-ray photon index, 1.62 -0.15,0.25 agrees well with the synchrotron radio index, 1.68 ±0.05, between 29.9 MHz and 5 GHz. Therefore, the inverse Compton interpretation for the diffuse X-ray emission is justified. A comparison between the radio and X-ray flux densities gives a moderate electron-energy dominance over in the east lobe of Fornax A, in spite of the dormancy of its nucleus. We also reexamined the ASCA result on the west lobe, to find that both lobes share the similar physical condition.

Original languageEnglish
Title of host publicationX-ray Universe 2005
Pages585-589
Number of pages5
Edition604
Publication statusPublished - Apr 10 2006
Externally publishedYes
EventX-ray Universe 2005 - Madrid, Spain
Duration: Sep 26 2005Sep 30 2005

Publication series

NameEuropean Space Agency, (Special Publication) ESA SP
Number604
Volume2
ISSN (Print)0379-6566

Other

OtherX-ray Universe 2005
CountrySpain
CityMadrid
Period9/26/059/30/05

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All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

Cite this

Isobe, N., Makishima, K., Tashiro, M., Ito, K., Iyomoto, N., & Kaneda, H. (2006). The electron and magnetic field energies in the east lobe of the radio galaxy fornax a, measured with XMM-Newton. In X-ray Universe 2005 (604 ed., pp. 585-589). (European Space Agency, (Special Publication) ESA SP; Vol. 2, No. 604).