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Title: Deep lensing with a twist: E and B modes in a field with multiple lenses

Journal Article · · Monthly Notices of the Royal Astronomical Society
ORCiD logo [1];  [2];  [1]
  1. Physics Department, University of California, Davis, 1 Shields Ave., Davis, CA 95616, USA
  2. Department of Astronomy, Yonsei University, 50 Yonsei-ro, Seoul 03722, Korea

We explore the weak lensing E- and B-mode shear signals of a field of galaxy clusters using both large-scale structure N-body simulations and multicolour Suprime-cam & Hubble Space Telescope observations. Using the ray-traced and observed shears along with photometric redshift catalogues, we generate mass maps of the foreground overdensities by optimally filtering the tangential shear that they induce on background galaxies. We then develop and test a method to approximate the foreground structure as a superposition of Navarro-Frenk- White-like haloes by locating these overdensities and determining their mass and redshift, thereby modelling the background correlated shear field as a sum of lensings induced by the foreground clusters. We demonstrate that the B-mode maps and shear correlation functions, which are generated by similarly filtering the cross shear in this method, are in agreement with observations and are related to the estimated cluster masses and locations as well as the distribution of background sources. Using the foreground mass model, we identify several sources of weak lensing B modes including leakage and edge effects, source clustering, and multiple lensing which can be observed in deep cosmic shear surveys.

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Research Foundation of Korea (NRF)
Grant/Contract Number:
SC0009999
OSTI ID:
1479837
Alternate ID(s):
OSTI ID: 1595417
Journal Information:
Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Vol. 482 Journal Issue: 1; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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