Nuw CDM cosmology from the weak-lensing convergence PDF

Author:

Boyle Aoife1ORCID,Uhlemann Cora2ORCID,Friedrich Oliver34,Barthelemy Alexandre1,Codis Sandrine15,Bernardeau Francis15,Giocoli Carlo67,Baldi Marco678ORCID

Affiliation:

1. CNRS & Sorbonne Université, UMR 7095, Institut d’Astrophysique de Paris, F-75014 Paris, France

2. School of Mathematics, Statistics and Physics, Newcastle University, Herschel Building, Newcastle-upon-Tyne NE1 7RU, UK

3. Kavli Institute for Cosmology, University of Cambridge, Cambridge CB3 0HA, UK

4. Churchill College, University of Cambridge, Cambridge CB3 0DS, UK

5. IPhT, DRF-INP, UMR 3680, CEA, Orme des Merisiers Bat 774, F-91191 Gif-sur-Yvette, France

6. INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, via Piero Gobetti 93/3, I-40129 Bologna, Italy

7. INFN – Sezione di Bologna, viale Berti Pichat 6/2, I-40127 Bologna, Italy

8. Dipartimento di Fisica e Astronomia, Alma Mater Studiorum Universita di Bologna, via Piero Gobetti 93/2, I-40129 Bologna, Italy

Abstract

ABSTRACT Pinning down the total neutrino mass and the dark energy equation of state is a key aim for upcoming galaxy surveys. Weak lensing is a unique probe of the total matter distribution whose non-Gaussian statistics can be quantified by the one-point probability distribution function (PDF) of the lensing convergence. We calculate the convergence PDF on mildly nonlinear scales from first principles using large-deviation statistics, accounting for dark energy and the total neutrino mass. For the first time, we comprehensively validate the cosmology dependence of the convergence PDF model against large suites of simulated lensing maps, demonstrating its per cent level precision and accuracy. We show that fast simulation codes can provide highly accurate covariance matrices, which can be combined with the theoretical PDF model to perform forecasts and eliminate the need for relying on expensive N-body simulations. Our theoretical model allows us to perform the first forecast for the convergence PDF that varies the full set of ΛCDM parameters. Our Fisher forecasts establish that the constraining power of the convergence PDF compares favourably to the two-point correlation function for a Euclid-like survey area at a single source redshift. When combined with a cosmic microwave background prior from Planck, the PDF constrains both the neutrino mass Mν and the dark energy equation of state w0 more strongly than the two-point correlation function.

Funder

Agence Nationale de la Recherche

Fondation Merac

CNES

ASI

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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1. Ray-tracing versus Born approximation in full-sky weak lensing simulations of the MillenniumTNG project;Monthly Notices of the Royal Astronomical Society;2024-08-23

2. Constraining modified gravity with weak-lensing peaks;Monthly Notices of the Royal Astronomical Society;2024-08-15

3. Weak lensing constraints on dark matter-baryon interactions with -body simulations and machine learning;Journal of Cosmology and Astroparticle Physics;2024-08-01

4. Lensing bias on cosmological parameters from bright standard sirens;Monthly Notices of the Royal Astronomical Society;2024-07-17

5. Clustering of dark matter in the cosmic web as a probe of massive neutrinos;Monthly Notices of the Royal Astronomical Society;2024-05-06

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