# Preparing for the cosmic shear data flood: Optimal data extraction and simulation requirements for stage IV dark energy experiments

@article{Taylor2018PreparingFT, title={Preparing for the cosmic shear data flood: Optimal data extraction and simulation requirements for stage IV dark energy experiments}, author={Peter L. Taylor and Thomas D. Kitching and Jason D. McEwen}, journal={Physical Review D}, year={2018} }

Upcoming photometric lensing surveys will considerably tighten constraints on the neutrino mass and the dark energy equation of state. Nevertheless it remains an open question of how to optimally extract the information and how well the matter power spectrum must be known to obtain unbiased cosmological parameter estimates. By performing a principal component analysis (PCA), we quantify the sensitivity of 3D cosmic shear and tomography with different binning strategies to different regions of…

## 17 Citations

### Euclid preparation

- PhysicsAstronomy & Astrophysics
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The analysis of weak gravitational lensing in wide-field imaging surveys is considered to be a major cosmological probe of dark energy. Our capacity to constrain the dark energy equation of state…

### k -cut cosmic shear: Tunable power spectrum sensitivity to test gravity

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If left unchecked modeling uncertainties at small scales, due to poorly understood baryonic physics and non-linear structure formation, will significantly bias Stage IV cosmic shear two-point…

### x -cut Cosmic shear: Optimally removing sensitivity to baryonic and nonlinear physics with an application to the Dark Energy Survey year 1 shear data

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We present a new method, called x-cut cosmic shear, which optimally removes sensitivity to poorly modeled scales from the two-point cosmic shear signal. We show that the x-cut cosmic shear covariance…

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Cosmic shear - the weak gravitational lensing effect generated by fluctuations of the gravitational tidal fields of the large-scale structure - is one of the most promising tools for current and…

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- 2020

In this work we explore the power of future large-scale surveys to constrain possible deviations from the standard single-field slow-roll inflationary scenario. Specifically, we parameterize possible…

### Accessing the high- ℓ frontier under the reduced shear approximation with k -cut cosmic shear

- PhysicsPhysical Review D
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The precision of Stage IV cosmic shear surveys will enable us to probe smaller physical scales than ever before, however, model uncertainties from baryonic physics and non-linear structure formation…

### On the road to per cent accuracy – V. The non-linear power spectrum beyond ΛCDM with massive neutrinos and baryonic feedback

- PhysicsMonthly Notices of the Royal Astronomical Society
- 2021

In the context of forthcoming galaxy surveys, to ensure unbiased constraints on cosmology and gravity when using non-linear structure information, per cent-level accuracy is required when modelling…

### DEMNUni: comparing nonlinear power spectra prescriptions in the presence of massive neutrinos and dynamical dark energy

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2022

We provide an accurate comparison, against large cosmological N-body simulations, of different prescriptions for modelling nonlinear matter power spectra in the presence of massive neutrinos and…

### Euclid: Modelling massive neutrinos in cosmology -- a code comparison

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It can be said that the impact of massive neutrinos at the sub-percent level in the most common summary statistics can be modeled at the lowest levels in the major code comparison presented here.

### Rainbow cosmic shear: Optimization of tomographic bins

- PhysicsPhysical Review D
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In this paper, we address the problem of finding optimal cosmic shear tomographic bins. We generalize the definition of a cosmic shear tomographic bin to be a set of commonly labeled voxels in…

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