448 citations · 4.1k across the 101 of their papers we have counts for
4 papers · 1 filter
XMM-Newton and Chandra observations of three X-ray faint early-type galaxies
E. O'Sullivan, T. J. Ponman
We present XMM-Newton observations of three X-ray under-luminous elliptical galaxies, NGC 3585, NGC 4494 and NGC 5322. All three galaxies have relatively large optical luminosities…
AWM 4 and MKW 4 - two very different poor clusters observed with XMM-Newton
Ewan O'Sullivan, J. M. Vrtilek
We present observations of two poor clusters, AWM 4 and MKW 4, observed by XMM-Newton. Both systems are relaxed, with little substructure evident in their X-ray halos or galaxy pop…
An XMM-Newton observation of the galaxy group MKW 4
E. O'Sullivan, J. M. Vrtilek, A. M. Read +2
We present an X-ray study of the galaxy group or poor cluster MKW 4. Working with XMM data we examine the distribution and properties of the hot gas which makes up the group halo.…
X-ray Scaling Properties of Early-type Galaxies
Ewan O'Sullivan, Trevor J. Ponman, Ross S. Collins
We present an analysis of 39 X-ray luminous early-type galaxies observed with the ROSAT PSPC. Using multi-component spectral and spatial fits to these data we have measured halo ab…