Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.3403d&link_type=abstract
American Astronomical Society, HEAD meeting #11, #34.03; Bulletin of the American Astronomical Society, Vol. 41, p.710
Astronomy and Astrophysics
Astronomy
Scientific paper
Vigorous cluster mergers provide a unique opportunity to directly "see" dark matter and to probe its properties through the analysis of the segregation of the baryonic and non-baryonic components. This is accomplished through detailed comparison of the mass distributions as traced by X-ray emitting gas and by gravitational lensing. This condition is rare and very few cluster have met good observational conditions for such analysis so far. This multi-wavelength analysis has the potential confront alternative gravity models such as MOND. Here, we present the preliminary results of a Chandra-HST analysis of the galaxy cluster A2744, a multiple cluster merger with TX > 12 keV, ample evidence of intracluster light and that presents at least 3 instances of matter-DM segregation.
Benítez Narciso
Bregman Jesse
Coe Dan
Cypriano Eduardo
Dupke Renato A.
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