Direct and reprocessed γ-ray emission of kpc-scale jets in FR I radio galaxies

Stawarz*, T. M. Kneiske, J. Kataoka

*この研究の対応する著者

研究成果: Conference contribution

抄録

We discuss the contribution of kiloparsec-scale jets in FR I radio galaxies to the diffuse γ-ray background radiation. The analyzed y-ray emission comes from inverse-Compton scattering of starlight photon fields by the ultrarelativistic electrons whose synchrotron radiation is detected from such sources at radio, optical and X-ray energies. We find that these objects, under the minimum-power hypothesis (corresponding to a magnetic field of 300 μG in the brightest knots of these jets), can contribute about one percent to the extragalactic γ-ray background measured by EGRET. We point out that this result already indicates that the magnetic fields in kpc-scale jets of low-power radio galaxies are not likely to be smaller than 10 μG on average, as otherwise the extragalactic γ-ray background would be overproduced.

本文言語English
ホスト出版物のタイトルFirst GLAST Symposium
ページ363-364
ページ数2
DOI
出版ステータスPublished - 2007
外部発表はい
イベント1st Gamma-ray Large Area Space Telescope Symposium, GLAST - Stanford, CA, United States
継続期間: 2007 2月 52007 2月 8

出版物シリーズ

名前AIP Conference Proceedings
921
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

Conference1st Gamma-ray Large Area Space Telescope Symposium, GLAST
国/地域United States
CityStanford, CA
Period07/2/507/2/8

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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