MACSJ0358.8-2955: much more distant and exciting than we thought

Details MACSJ0358.8-2955: much more distant and exciting than we thought MACSJ0358.8-2955: much more distant and exciting than we thought

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2901e&link_type=abstract

Chandra proposal ID #11800242

Physics

Scientific paper

We propose a short observation of MACSJ0358.8-2955, an extremely X-ray luminous cluster at z=0.434 (previously believed to be at z=0.17), to obtain first constraints on the spatial distribution of the gaseous intra-cluster medium in the cluster core. HST/ACS observations show the system to be highly disturbed as evinced by a string of giant elliptical galaxies and multiple gravitational arc systems delineating a very elongated critical line. At Lx=1.8e45 erg/s this system is not only the by far most X-ray luminous cluster known at any redshift that has yet to be observed by Chandra, it is also a prime candidate for a detailed study of cluster dynamics and the segregation of dark and luminous matter. The short observation proposed here will establish whether an in-depth study is warranted.

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