The inverse-Compton X-ray-emitting lobes of the high-redshift giant
radio galaxy 6C 0905+39
ArXiv 0803.1545 (2008)
Authors:
MC Erlund, AC Fabian, Katherine M Blundell
Abstract:
We present new XMM-Newton data of the high-redshift (z=1.883), Mpc-sized
giant radio galaxy 6C 0905+39. The larger collecting area and longer
observation time for our new data means that we can better characterise the
extended X-ray emission, in particular its spectrum, which arises from cosmic
microwave background photons scattered into the X-ray band by the energetic
electrons in the spent synchrotron plasma of the (largely) radio-quiet lobes of
6C 0905+39. We calculate the energy that its jet-ejected plasma has dumped into
its surroundings in the last 3 X 10^7 years and discuss the impact that
similar, or even more extreme, examples of spent, radio-quiet lobes would have
on their surroundings. Interestingly, there is an indication that the emission
from the hotspots is softer than the rest of the extended emission and the
core, implying it is due to synchrotron emission. We confirm our previous
detection of the low-energy turnover in the eastern hotspot of 6C 0905+39.
