On The Origin of Nuclear X-Ray Emission in Radio Galaxies

Details On The Origin of Nuclear X-Ray Emission in Radio Galaxies On The Origin of Nuclear X-Ray Emission in Radio Galaxies

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20511802e&link_type=abstract

American Astronomical Society Meeting 205, #118.02; Bulletin of the American Astronomical Society, Vol. 36, p.1545

Astronomy and Astrophysics

Astronomy

Scientific paper

The physical origin of continuum X-ray emission in the cores of radio galaxies is widely debated. We present spectral results from Chandra and XMM-Newton observations of a sample of low-redshift (z < 0.1) 3CRR radio galaxies, and consider whether the emission originates from the base of a relativistic jet, an accretion flow, or contains contributions from both. Our analysis finds correlations between the X-ray, radio, and optical luminosities of X-ray components with low intrinsic hydrogen column densities (NH), implying a common origin in the form of a jet. Several sources contain components with high intrinsic NH whose X-ray luminosities are not as expected from the correlations. These X-ray components are more likely to be accretion-dominated. For jet-dominated sources, we generally find that a hidden AGN component of order 1041 ergs s-1 is not excluded by the data, allowing the possibility of both components being present at varying levels in all radio galaxies.

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