Seeing the Invisible. Dark x Baryonic Matter Detachment in Abell 2744

Details Seeing the Invisible. Dark x Baryonic Matter Detachment in Abell 2744 Seeing the Invisible. Dark x Baryonic Matter Detachment in Abell 2744

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.

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