18 GHz SZ Measurements of the Bullet Cluster

Details 18 GHz SZ Measurements of the Bullet Cluster 18 GHz SZ Measurements of the Bullet Cluster

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011japa...32..541m&link_type=abstract

Journal of Astrophysics and Astronomy, Vol. 32, p. 541-544

Astronomy and Astrophysics

Astrophysics

Galaxies: Clusters: Individual (1E 0657-56, Rx J0658-5557), Radio Continuum: General, Techniques: Interferometric

Scientific paper

We present 18 GHz observations of the Bullet cluster using the Austalia Telescope Compact Array (ATCA), which show structure in the Sunyaev-Zeldovich effect; in particular, a deep, compact feature which does not correspond to any bright feature in X-ray, optical or lensing maps. In general, the relatively deeper SZE features appear to avoid the regions with the most intense X-ray emission. SZE displaced from X-ray centres implies that modeling cluster dynamics is non-trivial. The SZE distribution in the western parts of the cluster are co-spatial with the radio halo indicative of a common origin for the hot and relativistic electrons in the turbulent wake of the Bullet.

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