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The modified gravity light-cone simulation project – I. Statistics of matter and halo distributions

Arnold, Christian; Fosalba, Pablo; Springel, Volker; Puchwein, Ewald; Blot, Linda

The modified gravity light-cone simulation project – I. Statistics of matter and halo distributions Thumbnail


Authors

Christian Arnold

Pablo Fosalba

Volker Springel

Ewald Puchwein

Linda Blot



Abstract

We introduce a set of four very high resolution cosmological simulations exploring f(R) gravity, with 20483 particles in 768 and 1536h−1Mpc simulation boxes, for |f¯R0|=10−5 and Λ cold dark matter (ΛCDM), making the set the largest simulations of f(R) gravity to date. To mimic real observations, the simulations include a continuous 2D- and 3D-light-cone output dedicated to study lensing and clustering statistics. We present a detailed analysis and resolution study for the matter power spectrum in f(R) gravity over a wide range of scales. We also analyse the angular matter power spectrum and lensing convergence on the light-cone. In addition, we investigate the impact of modified gravity on the halo mass function, matter, and halo autocorrelation functions, linear halo bias, and the concentration–mass relation. The impact of f(R) gravity is generally larger on smaller scales and smaller redshift. Comparing our simulations to state-of-the-art hydrodynamical simulations, we confirm a degeneracy between f(R) gravity and baryonic feedback in the matter power spectrum on small scales, but also find that scales around k=1hMpc−1 are promising to distinguish both effects. The lensing convergence power spectrum is increased in f(R) gravity. Numerical fits are in good agreement with our simulations for both standard and modified gravity, but tend to overestimate their relative difference on non-linear scales. The halo bias is lower in f(R) gravity, whereas halo concentrations are increased for unscreened haloes.

Citation

Arnold, C., Fosalba, P., Springel, V., Puchwein, E., & Blot, L. (2019). The modified gravity light-cone simulation project – I. Statistics of matter and halo distributions. Monthly Notices of the Royal Astronomical Society, 483(1), 790-805. https://doi.org/10.1093/mnras/sty3044

Journal Article Type Article
Acceptance Date Nov 5, 2018
Online Publication Date Nov 10, 2018
Publication Date Feb 28, 2019
Deposit Date Apr 11, 2019
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 483
Issue 1
Pages 790-805
DOI https://doi.org/10.1093/mnras/sty3044

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Copyright Statement
© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.





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