Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.6705h&link_type=abstract
American Astronomical Society, AAS Meeting #211, #67.05; Bulletin of the American Astronomical Society, Vol. 39, p.857
Astronomy and Astrophysics
Astronomy
Scientific paper
We present a high resolution dark matter reconstruction of the z=0.16 Abell 901/902 supercluster from a weak lensing analysis of the HST STAGES survey. We detect the four main structures of the supercluster at high significance, resolving substructure within and between the clusters. We find that the distribution of dark matter is well traced by the cluster galaxies, with the brightest cluster galaxies marking out the strongest peaks in the dark matter distribution. We also find a significant extension of the dark matter distribution of Abell 901a in the direction of an infalling X-ray group Abell 901alpha. We compare our space-based lensing analysis with an earlier ground-based lensing analysis of the supercluster to demonstrate the importance of space-based imaging for future weak lensing dark matter "observations". We acknowledge support from HST grant GO-10395.
Bacon Dave
Balogh Michael
Barazza Fabio D.
Barden Marco
Bell Eric F.
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