期刊
ASTROPHYSICAL JOURNAL
卷 580, 期 2, 页码 L111-L115出版社
UNIV CHICAGO PRESS
DOI: 10.1086/345658
关键词
galaxies : individual (3C 452); magnetic fields; radiation mechanisms : nonthermal; radio continuum : galaxies; X-rays : galaxies
An 80 ks Chandra ACIS observation of the radio galaxy 3C 452 is reported. A diffuse X-ray emission associated with the lobes has been detected with high statistical significance, together with the X-ray nucleus of the host galaxy. The 0.5-5 keV ACIS spectrum of the diffuse emission is described by a two-component model, consisting of a soft thermal plasma emission from the host galaxy halo and a hard nonthermal power-law component. The hard component is ascribed to the inverse Comptonization of cosmic microwave background photons by the synchrotron-emitting electrons in the lobes, because its spectral energy index, 0.68 +/- 0.28, is consistent with the radio synchrotron index, 0.78. These results reveal a significant electron dominance in the lobes. The electrons are inferred to have a relatively uniform distribution, while the magnetic field is compressed toward the lobe periphery.
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