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All Outputs (16)

Emulators for the non-linear matter power spectrum beyond ΛCDM (2019)
Journal Article
Winther, H., Casas, S., Baldi, M., Koyama, K., Li, B., Lombriser, L., & Zhao, G.-B. (2019). Emulators for the non-linear matter power spectrum beyond ΛCDM. Physical Review D, 100, https://doi.org/10.1103/physrevd.100.123540

Accurate predictions for the nonlinear matter power spectrum are needed to confront theory with observations in current and near future weak-lensing and galaxy clustering surveys. We propose a computationally cheap method to create an emulator for mo... Read More about Emulators for the non-linear matter power spectrum beyond ΛCDM.

Cosmological test of gravity using weak lensing voids (2019)
Journal Article
Davies, C. T., Cautun, M., & Li, B. (2019). Cosmological test of gravity using weak lensing voids. Monthly Notices of the Royal Astronomical Society, 490(4), 4907-4917. https://doi.org/10.1093/mnras/stz2933

Modifications to general relativity often incorporate screening mechanisms in order to remain compatible with existing tests of gravity. The screening is less efficient in underdense regions, which suggests that cosmic voids can be a useful cosmologi... Read More about Cosmological test of gravity using weak lensing voids.

Simulating galaxy formation in f(R) modified gravity: Matter, halo, and galaxy-statistics (2019)
Journal Article
Arnold, C., & Li, B. (2019). Simulating galaxy formation in f(R) modified gravity: Matter, halo, and galaxy-statistics. Monthly Notices of the Royal Astronomical Society, 490(2), 2507-2520. https://doi.org/10.1093/mnras/stz2690

We present an analysis of the matter, halo and galaxy clustering in f(R)-gravity employing the SHYBONE full-physics hydrodynamical simulation suite. Our analysis focuses on the interplay between baryonic feedback and f(R)-gravity in the matter power... Read More about Simulating galaxy formation in f(R) modified gravity: Matter, halo, and galaxy-statistics.

A high-redshift test of gravity using enhanced growth of small structures probed by the neutral hydrogen distribution (2019)
Journal Article
Leo, M., Arnold, C., & Li, B. (2019). A high-redshift test of gravity using enhanced growth of small structures probed by the neutral hydrogen distribution. Physical Review D, 100(6), Article 064044. https://doi.org/10.1103/physrevd.100.064044

Future 21-cm intensity mapping surveys such as SKA can provide precise information on the spatial distribution of the neutral hydrogen (HI) in the postreionization epoch. This information will allow us to test the standard Λ cold dark matter paradigm... Read More about A high-redshift test of gravity using enhanced growth of small structures probed by the neutral hydrogen distribution.

Screening maps of the local Universe I - Methodology (2019)
Journal Article
Shao, S., Li, B., Cautun, M., Wang, H., & Wang, J. (2019). Screening maps of the local Universe I - Methodology. Monthly Notices of the Royal Astronomical Society, 489(4), 4912-4925. https://doi.org/10.1093/mnras/stz2450

We introduce the LOCal Universe Screening Test Suite (LOCUSTS) project, an effort to create ‘screening maps’ in the nearby Universe to identify regions in our neighbourhood which are screened, i.e., regions where deviations from General Relativity (G... Read More about Screening maps of the local Universe I - Methodology.

Early dark energy constraints on growing neutrino quintessence cosmologies (2019)
Journal Article
Noble Chamings, F., Avgoustidis, A., Copeland, E. J., Green, A. M., & Li, B. (2019). Early dark energy constraints on growing neutrino quintessence cosmologies. Physical Review D, 100(4), Article 043525. https://doi.org/10.1103/physrevd.100.043525

We investigate cosmological models in which dynamical dark energy consists of a scalar field whose present-day value is controlled by a coupling to the neutrino sector. The behavior of the scalar field depends on three functions: a kinetic function,... Read More about Early dark energy constraints on growing neutrino quintessence cosmologies.

The self similarity of weak lensing peaks (2019)
Journal Article
Davies, C. T., Cautun, M., & Li, B. (2019). The self similarity of weak lensing peaks. Monthly Notices of the Royal Astronomical Society, 488(4), 5833-5851. https://doi.org/10.1093/mnras/stz2157

We study the statistics of weak lensing convergence peaks, such as their abundance and two-point correlation function (2PCF), for a wide range of cosmological parameters Ωm and σ8 within the standard ΛCDM paradigm, focusing on intermediate-height pea... Read More about The self similarity of weak lensing peaks.

Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons (2019)
Journal Article
Robertson, A., Harvey, D., Massey, R., Eke, V., McCarthy, I. G., Jauzac, M., Li, B., & Schaye, J. (2019). Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons. Monthly Notices of the Royal Astronomical Society, 488(3), 3646-3662. https://doi.org/10.1093/mnras/stz1815

We present BAHAMAS-SIDM, the first large-volume, (400 h−1 Mpc)3, cosmological simulations including both self-interacting dark matter (SIDM) and baryonic physics. These simulations are important for two primary reasons: 1) they include the effects of... Read More about Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons.

Realistic simulations of galaxy formation in f(R) modified gravity (2019)
Journal Article
Arnold, C., Leo, M., & Li, B. (2019). Realistic simulations of galaxy formation in f(R) modified gravity. Nature Astronomy, 3(10), 945-954. https://doi.org/10.1038/s41550-019-0823-y

Future astronomical surveys will gather information that will allow gravity to be tested on cosmological scales, where general relativity is currently poorly constrained. We present a set of cosmological hydrodynamical simulations that follow galaxy... Read More about Realistic simulations of galaxy formation in f(R) modified gravity.

On the road to percent accuracy: nonlinear reaction of the matter power spectrum to dark energy and modified gravity (2019)
Journal Article
Cataneo, M., Lombriser, L., Heymans, C., Mead, A., Barreira, A., Bose, S., & Li, B. (2019). On the road to percent accuracy: nonlinear reaction of the matter power spectrum to dark energy and modified gravity. Monthly Notices of the Royal Astronomical Society, 488(2), 2121-2142. https://doi.org/10.1093/mnras/stz1836

We present a general method to compute the nonlinear matter power spectrum for dark energy and modified gravity scenarios with percent-level accuracy. By adopting the halo model and nonlinear perturbation theory, we predict the reaction of a ΛCDM mat... Read More about On the road to percent accuracy: nonlinear reaction of the matter power spectrum to dark energy and modified gravity.

The Galaxy Halo Connection in Modified Gravity Cosmologies: Environment Dependence of Galaxy Luminosity function (2019)
Journal Article
Devi, N. C., Rodríguez-Puebla, A., Valenzuela, O., Avila-Reese, V., Hernández-Aguayo, C., & Li, B. (2019). The Galaxy Halo Connection in Modified Gravity Cosmologies: Environment Dependence of Galaxy Luminosity function. Monthly Notices of the Royal Astronomical Society, 488(1), 782-802. https://doi.org/10.1093/mnras/stz1664

We investigate the dependence of the galaxy–halo connection and galaxy density field in modified gravity models using the N-body simulations for f(R) and nDGP models at z = 0. Because of the screening mechanisms employed by these models, chameleon an... Read More about The Galaxy Halo Connection in Modified Gravity Cosmologies: Environment Dependence of Galaxy Luminosity function.

A general framework to test gravity using galaxy clusters II: A universal model for the halo concentration in f(R) gravity (2019)
Journal Article
Mitchell, M. A., Arnold, C., He, J.-H., & Li, B. (2019). A general framework to test gravity using galaxy clusters II: A universal model for the halo concentration in f(R) gravity. Monthly Notices of the Royal Astronomical Society, 487(1), 1410-1425. https://doi.org/10.1093/mnras/stz1389

We present a novel fitting formula for the halo concentration enhancement in chameleon f(R) gravity relative to General Relativity (GR). The formula is derived by employing a large set of N-body simulations of the Hu-Sawicki f(R) model which cover a... Read More about A general framework to test gravity using galaxy clusters II: A universal model for the halo concentration in f(R) gravity.

Large-scale redshift space distortions in modified gravity theories (2019)
Journal Article
Hernández-Aguayo, C., Hou, J., Li, B., Baugh, C., & Sánchez, A. G. (2019). Large-scale redshift space distortions in modified gravity theories. Monthly Notices of the Royal Astronomical Society, 485(2), 2194-2213. https://doi.org/10.1093/mnras/stz516

Measurements of redshift space distortions (RSD) provide a means to test models of gravity on large-scales. We use mock galaxy catalogues constructed from large N-body simulations of standard and modified gravity models to measure galaxy clustering i... Read More about Large-scale redshift space distortions in modified gravity theories.

Measurement of marked correlation functions in SDSS-III Baryon Oscillation Spectroscopic Survey using LOWZ galaxies in Data Release 12 (2019)
Journal Article
Satpathy, S., Croft, R. A., Ho, S., & Li, B. (2019). Measurement of marked correlation functions in SDSS-III Baryon Oscillation Spectroscopic Survey using LOWZ galaxies in Data Release 12. Monthly Notices of the Royal Astronomical Society, 484(2), 2148-2165. https://doi.org/10.1093/mnras/stz009

Marked correlation functions, which are sensitive to the clustering of galaxies in different environments, have been proposed as constraints on modified gravity models. We present measurements of the marked correlation functions of galaxies in redshi... Read More about Measurement of marked correlation functions in SDSS-III Baryon Oscillation Spectroscopic Survey using LOWZ galaxies in Data Release 12.

The Santiago-Harvard-Edinburgh-Durham void comparison II: unveiling the Vainshtein screening using weak lensing (2019)
Journal Article
Paillas, E., Cautun, M., Li, B., Cai, Y.-C., Padilla, N., Armijo, J., & Bose, S. (2019). The Santiago-Harvard-Edinburgh-Durham void comparison II: unveiling the Vainshtein screening using weak lensing. Monthly Notices of the Royal Astronomical Society, 484(1), 1149–1165. https://doi.org/10.1093/mnras/stz022

We study cosmic voids in the normal-branch Dvali-Gabadadze-Porrati (nDGP) braneworld models, which are representative of a class of modified gravity theories where deviations from General Relativity are usually hidden by the Vainshtein screening in h... Read More about The Santiago-Harvard-Edinburgh-Durham void comparison II: unveiling the Vainshtein screening using weak lensing.

Novel Probes Project: Tests of Gravity on Astrophysical Scales (2019)
Journal Article
Baker, T., Barreira, A., Desmond, H., Ferreira, P., Jain, B., Koyama, K., Li, B., Lombriser, L., Nicola, A., Sakstein, J., & Schmidt, F. (2019). Novel Probes Project: Tests of Gravity on Astrophysical Scales. Reviews of Modern Physics, 93, Article 015003. https://doi.org/10.1103/revmodphys.93.015003

The Novel Probes Project, an initiative to advance the field of astrophysical tests of the dark sector by creating a forum that connects observers and theorists, is introduced. This review focuses on tests of gravity and is intended to be of use prim... Read More about Novel Probes Project: Tests of Gravity on Astrophysical Scales.