ar X iv : a st ro - p h / 02 11 09 9 v 1 6 N ov 2 00 2 The topology of weak lensing field in the neighborhood of MS 1054 - 03
نویسندگان
چکیده
We report the first measurement of genus curves for the two-dimensional mass map in the neighborhood of rich, X-ray luminous galaxy cluster MS1054-03 at z = 0.83, reconstructed from weak lensing data obtained by Suprime-Cam on the prime focus of 8.2m Subaru telescope . We find that the genus curve measured in the whole survey field deviates from that expected from a random Gaussian field. We show that this non-Gaussianity is induced by the rich cluster in this region, and that the genus curve for the region without the cluster is consistent with the prediction for a random Gaussian field. The results demonstrate the feasibility of the genus statistics to examine the non-Gaussianity due to the large scale structures and to probe the statistical properties of the large scale clustering. Subject headings: cosmology: observations – gravitational lensing – large-scale structure of universe – galaxies: clusters: individual(MS1054-03)
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ar X iv : a st ro - p h / 06 11 09 9 v 1 2 N ov 2 00 6 Nuclear Activity in UZC Compact Groups of Galaxies
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