Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-05-06
Astronomy and Astrophysics
Astrophysics
5 pages, 7 figures. To appear in "X-ray and Radio Connections", eds. Sjouwerman, L.O. & Dyer, K.K. (see http://www.aoc.nrao.ed
Scientific paper
10.1111/j.1365-2966.2004.07983.x
We present results on the physical states of three high-redshift powerful radio galaxies (3C 292 at z=0.7, 3C 184 at z=1, and 3C322 at z=1.7). They were obtained by combining radio measurements with X-ray measurements from XMM-Newton that separate spectrally and/or spatially radio-related and hot-gas X-ray emission. Originally observed as part of a programme to trace clusters of galaxies at high redshift, none of the sources is found to lie in a rich X-ray-emitting environment similar to those of some powerful radio galaxies at low redshift, although the estimated gas pressures are sufficient to confine the radio lobes. The weak gas emission is a particularly interesting result for 3C 184, where a gravitational arc is seen, suggesting the presence of a very massive cluster. Here Chandra data complement the XMM-Newton measurements in spatially separating X-ray extended emission from that associated with the nucleus and rather small radio source. 3C 292 is the source for which the X-ray-emitting gas is measured with the greatest accuracy, and its temperature of 2 keV and luminosity of 6.5E43 erg/s are both characteristic of a poor cluster. This source allows the most accurate measurement of inverse-Compton X-ray emission associated with the radio lobes. In all structures where the magnetic-field strength can be estimated through combining measurements of radio-synchrotron and inverse-Compton-X-ray emission, the field strengths are consistent with sources being in a state of minimum total energy.
Belsole Elena
Hardcastle Martin J.
Worrall Diana Mary
No associations
LandOfFree
XMM-Newton observations of three high redshift radio galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with XMM-Newton observations of three high redshift radio galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and XMM-Newton observations of three high redshift radio galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-711809