Weak lensing mass map and peak statistics in Canada-France-Hawaii Telescope Stripe 82 survey
作者： HuanYuan Shan , Jean-Paul Kneib , Johan Comparat , Eric Jullo , Aldée Charbonnier
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摘要: We present a weak lensing mass map covering similar to 124 deg(2) of the Canada-France-Hawaii Telescope Stripe 82 Survey (CS82). study statistics rare peaks in map, including peak abundance, peak-peak correlation functions and tangential-shear profiles around peaks. find that abundance detected CS82 is consistent with predictions from I \textgreater cold dark matter cosmological model, once noise effects are properly included. The different signal-to-noise ratio (SNR) well described by power laws, there clear cross-correlation between Sloan Digital Sky III/Constant Mass galaxies high SNR increase SNR. fit analytical models profiles, projected singular isothermal sphere (SIS) model Navarro, Frenk & White (NFW) plus two-halo term. For peaks, SIS rejected at 3 sigma. NFW term gives more acceptable fits data. Some match positions optically clusters, while others relatively dark. Comparing matched we difference signal factor 2, suggesting about half false detections.
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