43 citations · 46 across the 3 of their papers we have counts for
9 papers · 1 filter
Shock heating in the group atmosphere of the radio galaxy B2 0838+32A
Nazirah N. Jetha, Martin J. Hardcastle, Trevor J. Ponman +1
We present Chandra and radio observations, and analysis of Sloan Digital Sky Survey data, of the radio galaxy B2 0838+32A (4C 32.26) and its environment. The radio galaxy is at the…
The Mass Assembly of Fossil Groups of Galaxies in the Millennium Simulation
Ali Dariush, Habib G. Khosroshahi, Trevor J. Ponman +3
The evolution of present-day fossil galaxy groups is studied in the Millennium Simulation. Using the corresponding Millennium gas simulation and semi-analytic galaxy catalogues, we…
The dark haloes of early-type galaxies in low-density environments: XMM-Newton and Chandra observations of NGC 57, NGC 7796 and IC 1531
E. O'Sullivan, A. J. R. Sanderson, T. J. Ponman
We present analysis of Chandra and XMM-Newton observations of three early-type galaxies, NGC 57, NGC 7796 and IC 1531. All three are found in very low density environments, and app…
Temperature and abundance profiles of hot gas in galaxy groups - I. Results and statistical analysis
Jesper Rasmussen, Trevor J. Ponman
The distribution of metals in groups of galaxies holds important information about the chemical enrichment history of the Universe. Here we present radial profiles of temperature a…
On the Anomalous Temperature Distribution of the Intergalactic Medium in the NGC 3411 Group of Galaxies
E. O'Sullivan, J. M. Vrtilek, D. E. Harris +1
We present XMM, Chandra and VLA observations of the USGC S152 group and its central elliptical NGC 3411. Imaging of the group X-ray halo suggests it is relaxed with little apparent…
XMM-Newton study of 0.012<z<0.024 groups. I: Overview of the IGM thermodynamics
A. Finoguenov, T. J. Ponman, J. P. F. Osmond +1
We study the thermodynamic properties of the hot gas in a sample of groups in the 0.012-0.024 redshift range, using XMM-Newton observations. We present measurements of temperature,…