Detection of X-Ray Emission from the Eastern Radio Lobe of Pictor A (Articolo in rivista)

Type
Label
  • Detection of X-Ray Emission from the Eastern Radio Lobe of Pictor A (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Grandi, Paola; Guainazzi, Matteo; Maraschi, Laura; Morganti, Raffaella; Fusco-Femiano, Roberto; Fiocchi, Mariateresa; Ballo, Lucia; Tavecchio, Fabrizio (2003)
    Detection of X-Ray Emission from the Eastern Radio Lobe of Pictor A
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Grandi, Paola; Guainazzi, Matteo; Maraschi, Laura; Morganti, Raffaella; Fusco-Femiano, Roberto; Fiocchi, Mariateresa; Ballo, Lucia; Tavecchio, Fabrizio (literal)
Pagina inizio
  • 123 (literal)
Pagina fine
  • 127 (literal)
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  • 586 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Rivelazione della controparte in raggi X dell'emissione estesa nei lobi della radiogalassia Pictor A. L'emissione X e' prodotta da interazioni degli elettroni relativistici con la radiazione di fondo cosmico, implicando l'assenza di equipartizione tra l'energia delle particelle relativistiche ed il campo magnetico. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • IASF/CNR Bologna; ESA/Vilspa Madrid; INAF/Brera Milano; SRON, Olanda; IASF/CNR Roma; Universita' Roma; (literal)
Titolo
  • Detection of X-Ray Emission from the Eastern Radio Lobe of Pictor A (literal)
Abstract
  • The XMM-Newton satellite has revealed extended X-ray emission from the eastern radio lobe of the Fanaroff-Riley II radio galaxy Pictor A. The X-ray spectrum, accumulated on a region covering about half the entire radio lobe, is well described by both a thermal (kT=5+9-2 keV) model and a power law with an energy index áX=0.6+/-0.2. The X-ray emission could be thermal and produced by circumgalactic gas shocked by the expanding radio lobe or, alternatively, by inverse Compton (IC) scattering of cosmic microwave background photons by relativistic electrons in the lobe. The latter possibility seems to be supported by the good agreement between the lobe-averaged synchrotron radio index (<áradio>=0.8) and the X-ray energy slope áX. However, if this is the case, the magnetic field (BIC~1-2 ìG), as deduced from the comparison of the IC X-ray and radio fluxes, is more than a factor of 2 below the equipartition value estimated in the same X-ray region. (literal)
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