The X-ray spectrum of the broad-line radio galaxy 3C445

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Spectroscopy, Radio Galaxies, X Ray Spectra, Abundance, Bremsstrahlung, Emission Spectra, Metallicity, Spectral Line Width, Spectrum Analysis

Scientific paper

The first X-ray spectrum of the giant radio galaxy 3C445 is reported. The spectrum is well fitted by a power law of slope close to the 'canonical' value for emission-line galaxies. This suggests that the X-ray emission of 3C445 is dominated by its Seyfert nucleus and is not directly related to the radio flux, a conclusion supported by the large low-energy absorption evident from the X-ray spectrum. The implied intrinsic absorbing column of about 1.7 x 10 to the 23rd/sq cm is the largest ever seen for such a high-luminosity source as 3C445.

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