Turbulence in galaxy clusters - a new capability for the RGS

Details Turbulence in galaxy clusters - a new capability for the RGS Turbulence in galaxy clusters - a new capability for the RGS

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...37s&link_type=abstract

XMM-Newton Proposal ID #06512402

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Rxj 1532.9+3021, Macs J2229.7-27

Scientific paper

We propose to observe five moderate redshift cool core clusters to take advantage of a recently confirmed capability of the RGS instruments, to measure or place limits on the amount of turbulence in cluster cores. Our targets have bright cores and are at moderate redshift, so the degree of spatial broadening on the spectra will be low, and we will be able to measure or place tight limits on the velocity broadening in each object (less than 300 km/s). We will be able to place limits of 9--16 per cent on the fraction of turbulent pressure of the total pressure. An important secondary objective will be to study AGN feedback in luminous cluster cores. We will be able to determine whether AGN feedback matches cooling to better than 10 per cent.

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