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X-raying the Hubble Frontier Fields cluster Abell 2744

Published online by Cambridge University Press:  27 October 2016

Dominique Eckert
Dominique Eckert*
Affiliation:
Department of Astronomy, University of Geneva, Ch. dEcogia 16, 1290 Versoix, Switzerland email: [email protected]
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Abstract

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Abell 2744 was the first HFF cluster completed. It displays a fascinating complexity in its distribution of dark and luminous matter, which led to its nickname of the Pandora cluster. In late 2014 we obtained a deep (110 ks) observation of this cluster with XMM-Newton, with the aim of making a detailed comparison between the optical, X-ray and lensing properties of this system. The new X-ray observation unveiled the presence of three hot gas filaments extending on scales of several Mpc and connected to the cluster core. The X-ray structures coincide spatially with the distribution of galaxies and dark matter and provide strong evidence for the existence of the elusive warm-hot intergalactic medium (WHIM). The new observation also reveals the complexity of the thermodynamic structure of the cluster core and a probable shock front associated with the radio relic located 1 Mpc NW of the cluster core.

Keywords

galaxies: clusters: individual (Abell 2744)X-rays: galaxies: clustersgravitational lensinglarge-scale structure of universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29B: Astronomy in Focus , August 2015 , pp. 760 - 763
Copyright
Copyright © International Astronomical Union 2016 

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