484 citations · 13.1k across the 142 of their papers we have counts for
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AGN heating in galaxy groups: A statistical study
N. N. Jetha, T. J. Ponman, M. J. Hardcastle +1
We present gas temperature, density, entropy and cooling time profiles for the cores of a sample of 15 galaxy groups observed with {\it Chandra}. We find that the entropy profiles…
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,…
First results of the XI Groups Project: Studying an unbiased sample of galaxy groups
Jesper Rasmussen, Trevor J. Ponman, John S. Mulchaey +2
X-ray observations of hot, intergalactic gas in galaxy groups provide a useful means of characterizing the global properties of groups. However, X-ray studies of large group sample…
A statistically-selected Chandra sample of 20 galaxy clusters -- I. Temperature and cooling time profiles
Alastair J. R. Sanderson, Trevor J. Ponman, Ewan O'Sullivan
We present an analysis of 20 galaxy clusters observed with the Chandra X-ray satellite, focussing on the temperature structure of the intracluster medium and the cooling time of th…
The central elliptical galaxy in fossil groups and formation of BCGs
Habib G. Khosroshahi, Trevor. J. Ponman, Laurence R. Jones
We study the dominant central giant elliptical galaxies in ``Fossil groups'' using deep optical (R-band) and near infrared (Ks-band) photometry. These galaxies are as luminous as t…