DLSCL J0916+2953: A New Transverse Cluster Merger

Details DLSCL J0916+2953: A New Transverse Cluster Merger DLSCL J0916+2953: A New Transverse Cluster Merger

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12377d&link_type=abstract

HST Proposal ID #12377. Cycle 18

Physics

Scientific paper

Merging clusters of galaxies are beginning to provide constraints on fundamental physics, such as the dark matter self-interaction cross-section and the matter/antimatter ratio. We request joint Chandra and HST imaging to examine a merger at z=0.53 which we have identified optically and spectroscopically confirmed. Our optical data and weak lensing mass map clearly show three sub-clusters within the same redshift range, while our SZ data are consistent with an offset between the hot ICM and sub-clusters; Combined HST and Chandra imaging are needed to confirm this offset and provide accurate displacements between X-ray-emitting gas, galaxies, and mass which can constrain the physics of merging clusters. The requested observations will also facilitate a wide range of non-merger science.;

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