448 citations · 4.1k across the 101 of their papers we have counts for
20 papers · 1 filter
A Chandra X-ray view of Stephan's Quintet: Shocks and Star-formation
E. O'Sullivan, S. Giacintucci, J. M. Vrtilek +2
We use a deep Chandra observation to examine the structure of the hot intra-group medium of the compact group of galaxies Stephan's Quintet. The group is thought to be undergoing a…
The PN.S Elliptical Galaxy Survey: the dark matter in NGC 4494
N. R. Napolitano, A. J. Romanowsky, L. Coccato +12
We present new Planetary Nebula Spectrograph observations of the ordinary elliptical galaxy NGC 4494, resulting in positions and velocities of 255 PNe out to 7 effective radii (25…
A GMRT multifrequency radio study of the isothermal core of the poor galaxy cluster AWM 4
S. Giacintucci, J. M. Vrtilek, M. Murgia +7
We present a detailed radio morphological study and spectral analysis of the wide-angle-tail radio source 4C +24.36 associated with the dominant galaxy in the relaxed galaxy cluste…
The nature of the ghost cavity in the NGC 741 group
Nazirah N. Jetha, Martin J. Hardcastle, Arif Babul +4
We discuss the effects of energy injection into the intra-group medium of the group of galaxies associated with NGC 741. The X-ray emission reveals a large bubble, which in the abs…
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…
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…