Dark Matter in Galaxy Cluster 1E0657-56: Measuring the Invisible With Gravitational Lensing

Details Dark Matter in Galaxy Cluster 1E0657-56: Measuring the Invisible With Gravitational Lensing Dark Matter in Galaxy Cluster 1E0657-56: Measuring the Invisible With Gravitational Lensing

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.3707b&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #37.07; Bulletin of the American Astronomical Society, V

Physics

Scientific paper

The cluster of galaxies 1E0657-56 has been the subject of intense ongoing research in the last few years. This system is remarkably well-suited to addressing outstanding issues in both cosmology and fundamental physics. It is one of the hottest and most luminous X-ray clusters known and is unique in being a major supersonic cluster merger occurring nearly in the plane of the sky, earning it the nickname "the Bullet Cluster". I will present our measurements of the composition of this system, show the evidence for existence of dark matter, and describe limits that can be placed on the intrinsic properties of dark matter particles. In addition, I will explain how this cluster offers a serious challenge to MOdified Newtonian Dynamics (MOND) theories.

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