Velocity Tomography of the Intracluster Gas with XMM

Details Velocity Tomography of the Intracluster Gas with XMM Velocity Tomography of the Intracluster Gas with XMM

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop..163d&link_type=abstract

XMM-Newton Proposal ID #05043202

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, A576-Offset1, A576-Offset2, Xmm-Newton Proposal 05043202

Scientific paper

We have recently found evidence of supersonic bulk velocities in the ICM of A576 & A376. The dependence of these measurements on the gain stability of the spectrometers makes the confirmation of these results crucial. Such high gas velocities have a strong impact on our understanding of formation and evolution of clusters and also in determining basic physical characteristics such as gravitating mass and energetics. Given the high magnitude of the velocity gradient and its spatial extent, XMM provides a unique opportunity to corroborate and improve such measurements. The excellent gain stability of EPIC-MOS will allows us to tailor the observation for velocity studies reducing individual velocity errors to ~ 400--800 km/s, with relatively short exposures.

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