A deep Chandra observation of the cluster environment of the z=1.786 radio galaxy 3C294

Fabian, A C
Sanders, J S
Crawford, C S
Ettori, S

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Publication date

January 2003

DOI

10.1046/j.1365-8711.2003.06394.x

ISSN

0035-8711

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Abstract

We report the results from a 200 ks Chandra observation of the z=1.786 radio galaxy 3C294 and its cluster environment, increasing by tenfold our earlier observation. The diffuse emission, extending about 100 kpc around the nucleus, has a roughly hourglass shape in the N-S direction with surprisingly sharp edges to the N and S. The spectrum of the diffuse emission is well fitted by either a thermal model of temperature 3.5 keV and abundance <0.9 solar (2-sigma), or a power-law with photon index 2.3. If the emission is due to hot gas then the sharp edges mean that it is probably not in hydrostatic equilibrium. Much of the emission is plausibly due to inverse Compton scattering of the Cosmic Microwave Background (CMB) by nonthermal electrons p...