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Title: Constraining neutrino mass with the tomographic weak lensing bispectrum

Abstract

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 m ν, the matter density Ω m 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 Ω m and 57% for A s.

Authors:
 [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
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE
OSTI Identifier:
1527374
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2019; Journal Issue: 05; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English

Citation Formats

Coulton, William R., Liu, Jia, Madhavacheril, Mathew S., Böhm, Vanessa, and Spergel, David N. Constraining neutrino mass with the tomographic weak lensing bispectrum. United States: N. p., 2019. Web. doi:10.1088/1475-7516/2019/05/043.
Coulton, William R., Liu, Jia, Madhavacheril, Mathew S., Böhm, Vanessa, & Spergel, David N. Constraining neutrino mass with the tomographic weak lensing bispectrum. United States. doi:10.1088/1475-7516/2019/05/043.
Coulton, William R., Liu, Jia, Madhavacheril, Mathew S., Böhm, Vanessa, and Spergel, David N. Fri . "Constraining neutrino mass with the tomographic weak lensing bispectrum". United States. doi:10.1088/1475-7516/2019/05/043.
@article{osti_1527374,
title = {Constraining neutrino mass with the tomographic weak lensing bispectrum},
author = {Coulton, William R. and Liu, Jia and Madhavacheril, Mathew S. and Böhm, Vanessa and Spergel, David N.},
abstractNote = {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.},
doi = {10.1088/1475-7516/2019/05/043},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2019,
place = {United States},
year = {2019},
month = {5}
}

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