The topology of weak lensing field in the neighborhood of MS1054-03

Details The topology of weak lensing field in the neighborhood of MS1054-03 The topology of weak lensing field in the neighborhood of MS1054-03

2002-11-06

arxiv.org/abs/astro-ph/0211099v2

Astrophys.J.582:L67-L70,2003

Astronomy and Astrophysics

Astrophysics

13 pages, 4 figures, submitted to The Astrophysical Journal Letters

Scientific paper

10.1086/367717

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.

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