MACS1354+77: A new ``bullet' cluster?

Details MACS1354+77: A new ``bullet' cluster? MACS1354+77: A new ``bullet' cluster?

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2912m&link_type=abstract

Chandra proposal ID #11800560

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The "bullet cluster", consisting of two galaxy clusters shortly after collision, has been an invaluable laboratory for physics on many scales: cosmological structure formation, merger evolution, dark matter physics, and shock hydrodynamics. Additional such systems, with different parameters (time post-collision, component mass ratios, collision and shock velocities, line-of-sight orientations) are needed. We have found a new candidate system of this kind at z=0.4, with multiple strong-lensing features that permit accurate modeling of the two, roughly equal, mass distributions. A brief exploratory Chandra observation will reveal if this object is another bullet-type case. Based on previous examples of merging clusters, this initial experiment will already enable a wealth of science.

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