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Investigating the Relationship Between the Hot Gas and the Dark Matter Components of Galaxy Clusters.

Published online by Cambridge University Press:  01 June 2007

Leila C. Powell ,
Scott T. Kay ,
Arif Babul  and
Andisheh Mahdavi
Leila C. Powell
Affiliation:
Oxford Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK email: [email protected]
Scott T. Kay
Affiliation:
Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire, SK11 9DL, UK
Arif Babul
Affiliation:
University of Victoria, Department of Physics and Astronomy, Victoria, V8P 5C2, Canada
Andisheh Mahdavi
Affiliation:
University of Victoria, Department of Physics and Astronomy, Victoria, V8P 5C2, Canada
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Abstract

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Various differences in galaxy cluster properties derived from X-ray and weak lensing observations have been highlighted in the literature. One such difference is the observation of mass concentrations in lensing maps which have no X-ray counterparts (e.g. Jee, White, Ford et al. 2005). We investigate this issue by identifying substructures in maps of projected total mass (analogous to weak lensing mass reconstructions) and maps of projected X-ray surface brightness for three simulated clusters. We then compare the 2D mass substructures with both 3D subhalo data and the 2D X-ray substructures. Here we present preliminary results from the first comparison, where we have assessed the impact of projecting the data on subhalo identification.

Keywords

X-rays: galaxies: clustersgravitational lensingmethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 374 - 375
Copyright
Copyright © International Astronomical Union 2008

References

Jee, M. J., White, R. L., Ford, H. C., Blakeslee, J. P., Illingworth, G. D., Coe, D. A. & Tran, K.-V. H. 2005, ApJ 634, 813–832CrossRefGoogle Scholar
Springel, V. 2005, MNRAS 364, 1105–1134CrossRefGoogle Scholar
Springel, V., White, S. D. M., Tormen, G. & Kauffmann, G. 2001, MNRAS 328, 726–750CrossRefGoogle Scholar