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An emulator-based halo model in modified gravity – I. The halo concentration–mass relation and density profile (2023)
Journal Article
Ruan, C.-Z., Cuesta-Lazaro, C., Eggemeier, A., Li, B., Baugh, C. M., Arnold, C., Bose, S., Hernández-Aguayo, C., Zarrouk, P., & Davies, C. T. (2024). An emulator-based halo model in modified gravity – I. The halo concentration–mass relation and density profile. Monthly Notices of the Royal Astronomical Society, 527(2), 2490–2507. https://doi.org/10.1093/mnras/stad3021

Fingerprints of modified gravity on galaxies in voids (2022)
Journal Article
Cataldi, P., Pedrosa, S., Padilla, N., Landau, S., Arnold, C., & Li, B. (2022). Fingerprints of modified gravity on galaxies in voids. Monthly Notices of the Royal Astronomical Society, 515(4), 5358-5374. https://doi.org/10.1093/mnras/stac2122

We search for detectable signatures of f(R) gravity and its chameleon screening mechanism in the baryonic and dark matter (DM) properties of simulated void galaxies. The enhancement of the gravitational acceleration can have a meaningful impact on th... Read More about Fingerprints of modified gravity on galaxies in voids.

Fast full N-body simulations of generic modified gravity: derivative coupling models (2022)
Journal Article
Hernández-Aguayo, C., Ruan, C.-Z., Li, B., Arnold, C., Baugh, C. M., Klypin, A., & Prada, F. (2022). Fast full N-body simulations of generic modified gravity: derivative coupling models. Journal of Cosmology and Astroparticle Physics, 2022, Article 048. https://doi.org/10.1088/1475-7516/2022/01/048

We present mg-glam, a code developed for the very fast production of full N-body cosmological simulations in modified gravity (MG) models. We describe the implementation, numerical tests and first results of a large suite of cosmological simulations... Read More about Fast full N-body simulations of generic modified gravity: derivative coupling models.

Making use of sub-resolution haloes in N-body simulations (2021)
Journal Article
Armijo, J., Baugh, C. M., Padilla, N. D., Norberg, P., & Arnold, C. (2022). Making use of sub-resolution haloes in N-body simulations. Monthly Notices of the Royal Astronomical Society, 510(1), 29-33. https://doi.org/10.1093/mnrasl/slab122

Conservative mass limits are often imposed on the dark matter halo catalogues extracted from N-body simulations. By comparing simulations with different mass resolutions, at z = 0 we find that even for haloes resolved by 100 particles, the lower reso... Read More about Making use of sub-resolution haloes in N-body simulations.

Towards testing the theory of gravity with DESI: summary statistics, model predictions and future simulation requirements (2021)
Journal Article
Alam, S., Arnold, C., Aviles, A., Bean, R., Cai, Y.-C., Cautun, M., Cervantes-Cota, J. L., Cuesta-Lazaro, C., Chandrachani Devi, N., Eggemeier, A., Fromenteau, S., Gonzalez-Morales, A. X., Halenka, V., He, J.-H., Hellwing, W. A., Hernandez-Aguayo, C., Ishak, M., Koyama, K., Li, B., de la Macorra, A., …Zheng, Y. (2021). Towards testing the theory of gravity with DESI: summary statistics, model predictions and future simulation requirements. Journal of Cosmology and Astroparticle Physics, 11, Article 050. https://doi.org/10.1088/1475-7516/2021/11/050

Shortly after its discovery, General Relativity (GR) was applied to predict the behavior of our Universe on the largest scales, and later became the foundation of modern cosmology. Its validity has been verified on a range of scales and environments... Read More about Towards testing the theory of gravity with DESI: summary statistics, model predictions and future simulation requirements.

A general framework to test gravity using galaxy clusters IV: cluster and halo properties in DGP gravity (2021)
Journal Article
Mitchell, M. A., Hernández-Aguayo, C., Arnold, C., & Li, B. (2021). A general framework to test gravity using galaxy clusters IV: cluster and halo properties in DGP gravity. Monthly Notices of the Royal Astronomical Society, 508(3), 4140-4156. https://doi.org/10.1093/mnras/stab2817

We study and model the properties of galaxy clusters in the normal-branch Dvali–Gabadadze–Porrati (nDGP) model of gravity, which is representative of a wide class of theories that exhibit the Vainshtein screening mechanism. Using the first cosmologic... Read More about A general framework to test gravity using galaxy clusters IV: cluster and halo properties in DGP gravity.

Galaxy formation in the brane world I: overview and first results (2021)
Journal Article
Hernández-Aguayo, C., Arnold, C., Li, B., & Baugh, C. M. (2021). Galaxy formation in the brane world I: overview and first results. Monthly Notices of the Royal Astronomical Society, 503(3), 3867-3885. https://doi.org/10.1093/mnras/stab694

We carry out ‘full-physics’ hydrodynamical simulations of galaxy formation in the normal-branch Dvali–Gabadadze–Porrati (nDGP) braneworld model using a new modified version of the AREPO code and the IllustrisTNG galaxy formation model. We simulate tw... Read More about Galaxy formation in the brane world I: overview and first results.