Sunyaev-Zeldovich Effect observations of sub-structure in galaxy clusters

Details Sunyaev-Zeldovich Effect observations of sub-structure in galaxy clusters Sunyaev-Zeldovich Effect observations of sub-structure in galaxy clusters

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2110s&link_type=abstract

ATNF proposal C2037, Semester: April, 2009

Physics

Extragalactic, Atca

Scientific paper

We propose to observe the 'bullet' cluster of galaxies - 1E 0657-56 - which consists of two sub-clusters in the process of merging and manifests relatively cold clouds plowing through hot intra-cluster gas, using the ATCA in H75 and H168 arrays at 7 and 12 mm. We aim to image the sub-structure in the gas pressure distribution via the inverse-Compton scattering of cosmic microwave background photons (the Sunyaev-Zeldovich Effect; SZE). Additionally, we anticipate detection, for the first time ever, of polarized SZE from anisotropic electron distribution in consequence of the enhancement of cluster magnetic fields as they drape the cold fronts. The observations constitute a probe of fine structure in the physical state of the intra-cluster gas, the physics of propagation and stability of cold fronts in cluster mergers and a measure of cluster magnetic field.

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