X-ray emission properties of large scale jets, hotspots and lobes in active galactic nuclei

Jun Kataoka, Lukasz Stawarz

研究成果: Conference contribution

抄録

We examine a systematic comparison of jet-knots, hotspots and radio lobes recently observed with Chandra and ASCA. The data was compiled at radio (5 GHz) and X-ray frequencies (1keV) for more than 40 radio galaxies. We examined three models for the X-ray production: synchrotron (SYN), synchrotron self-Compton (SSC) and external Compton on CMB photons (EC). For the SYN sources, X-ray photons are produced by ultrarelativistic electrons with energies 10-100 TeV that must be accelerated in situ. For the other objects, a simple formulation of calculating the "expected" SSC or EC fluxes under an equipartition hypothesis is presented. We confirmed that the observed X-ray fluxes are close to the expected ones for non-relativistic emitting plasma velocities in the case of radio lobes and majority of hotspots, whereas considerable fraction of jet-knots is too bright at X-rays to be explained in this way. We concluded, if the inverse-Compton model is the case, the X-ray bright jet-knots are most likely far from the minimum-power condition. We however prefer the other possibility, namely that the observed X-ray emission from all of the jet-knots is synchrotron in origin.

本文言語English
ホスト出版物のタイトルX-ray Universe 2005
ページ633-634
ページ数2
604
出版ステータスPublished - 2006 4 10
外部発表はい
イベントX-ray Universe 2005 - Madrid, Spain
継続期間: 2005 9 262005 9 30

出版物シリーズ

名前European Space Agency, (Special Publication) ESA SP
番号604
2
ISSN(印刷版)0379-6566

Conference

ConferenceX-ray Universe 2005
CountrySpain
CityMadrid
Period05/9/2605/9/30

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

フィンガープリント 「X-ray emission properties of large scale jets, hotspots and lobes in active galactic nuclei」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル