Speaker
Description
We present an imaging and spectral analysis of Chandra data for the radio galaxy 3C 187 (z = 0.465). The diffuse X-ray emission around 3C 187 in the 0.5-3 keV band is found to extend up to ~ 900 kpc along the radio lobe direction and ~ 700 kpc in the cross-cone direction. Spectral X-ray analysis in combination with radio data yields a possible interpretation of the emission observed in the lobes as IC/CMB radiation. In a thermal scenario, the emission from the cones can be interpreted as thermal radiation from hot gas with temperatures of ~ 2.2 keV and ~ 5.4 keV, respectively. Using NOMAD optical data we found that 3C 187 belongs to a red-sequence of 14 optical sources whose color distribution differs significantly from background sources. Although this can be an indication that 3C 187 belongs to a cluster of galaxies, whose ICM can be responsible for the emission observed in the north lobe and cross-cone region, deeper X-ray observations and optical spectroscopic data are needed to get a clearer picture of this source.
