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Title: Constraining neutrino mass with the tomographic weak lensing bispectrum

Journal Article · · Journal of Cosmology and Astroparticle Physics
 [1];  [2];  [2];  [3];  [4]
  1. Kavli Inst. for Cosmology Cambridge, Inst. of Astronomy, Cambridge (United Kingdom); Princeton Univ., NJ (United States). Dept. of Physics
  2. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
  3. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences; Flatiron Inst., New York, NY (United States). Center for Computational Astrophysics

We explore the effect of massive neutrinos on the weak lensing shear bispectrum using the Cosmological Massive Neutrino Simulations. We find that the primary effect of massive neutrinos is to suppress the amplitude of the bispectrum with limited effect on the bispectrum shape. The suppression of the bispectrum amplitude is a factor of two greater than the suppression of the small scale power-spectrum. For an LSST-like weak lensing survey that observes half of the sky with five tomographic redshift bins, we explore the constraining power of the bispectrum on three cosmological parameters: the sum of the neutrino mass Σ mν, the matter density Ωm and the amplitude of primordial fluctuations As. Bispectrum measurements alone provide similar constraints to the power spectrum measurements and combining the two probes leads to significant improvements than using the latter alone. We find that the joint constraints tighten the power spectrum 95% constraints by ~ 32% for Σ mν, 13% for Ωm and 57% for As.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1527374
Alternate ID(s):
OSTI ID: 22898757
Journal Information:
Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 05 Vol. 2019; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

The self-similarity of weak lensing peaks journal August 2019
Cosmic shear covariance matrix in w CDM: Cosmology matters journal November 2019
Separate Universe simulations with IllustrisTNG: baryonic effects on power spectrum responses and higher-order statistics journal July 2019
Constraining neutrino mass with weak lensing Minkowski Functionals text January 2018
Constraining neutrino mass with weak lensing Minkowski Functionals text January 2018
Constraining neutrino mass with weak lensing Minkowski Functionals journal June 2019
Separate Universe Simulations with IllustrisTNG: baryonic effects on power spectrum responses and higher-order statistics text January 2019
MADLens, a python package for fast and differentiable non-Gaussian lensing simulations preprint January 2020