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Looking for a twist: probing the cosmological gravitomagnetic effect via weak lensing-kSZ cross correlations (2021)
Journal Article
Barrera-Hinojosa, C., Li, B., & Cai, Y. (2022). Looking for a twist: probing the cosmological gravitomagnetic effect via weak lensing-kSZ cross correlations. Monthly Notices of the Royal Astronomical Society, 510(3), 3589-3604. https://doi.org/10.1093/mnras/stab3657

General relativity predicts that the rotational momentum flux of matter twists the space–time via a vector gravitomagnetic (frame-dragging) field, which remains undetected in cosmology. This vector field induces an additional gravitational lensing ef... Read More about Looking for a twist: probing the cosmological gravitomagnetic effect via weak lensing-kSZ cross correlations.

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., Cautun, M., …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 – V. A self-consistent pipeline for unbiased constraints of f(R) gravity (2021)
Journal Article
Mitchell, M. A., Arnold, C., & Li, B. (2021). A general framework to test gravity using galaxy clusters – V. A self-consistent pipeline for unbiased constraints of f(R) gravity. Monthly Notices of the Royal Astronomical Society, 508(3), 4157-4174. https://doi.org/10.1093/mnras/stab2703

We present a Markov chain Monte Carlo pipeline that can be used for robust and unbiased constraints of f(R) gravity using galaxy cluster number counts. This pipeline makes use of a detailed modelling of the halo mass function in f(R) gravity, which i... Read More about A general framework to test gravity using galaxy clusters – V. A self-consistent pipeline for unbiased constraints of f(R) gravity.

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.

Fast generation of mock galaxy catalogues in modified gravity models with COLA (2021)
Journal Article
Fiorini, B., Koyama, K., Izard, A., Winther, H. A., Wright, B. S., & Li, B. (2021). Fast generation of mock galaxy catalogues in modified gravity models with COLA. Journal of Cosmology and Astroparticle Physics, 2021(09), Article 021. https://doi.org/10.1088/1475-7516/2021/09/021

We investigate the viability of producing galaxy mock catalogues with COmoving Lagrangian Acceleration (COLA) simulations in Modified Gravity (MG) models employing the Halo Occupation Distribution (HOD) formalism. In this work, we focus on two theori... Read More about Fast generation of mock galaxy catalogues in modified gravity models with COLA.

An optimal non-linear method for simulating relic neutrinos (2021)
Journal Article
Elbers, W., Frenk, C. S., Jenkins, A., Li, B., & Pascoli, S. (2021). An optimal non-linear method for simulating relic neutrinos. Monthly Notices of the Royal Astronomical Society, 507(2), 2614-2631. https://doi.org/10.1093/mnras/stab2260

Cosmology places the strongest current limits on the sum of neutrino masses. Future observations will further improve the sensitivity and this will require accurate cosmological simulations to quantify possible systematic uncertainties and to make pr... Read More about An optimal non-linear method for simulating relic neutrinos.

Constraining cosmology with weak lensing voids (2021)
Journal Article
Davies, C. T., Cautun, M., Giblin, B., Li, B., Harnois-Déraps, J., & Cai, Y. (2021). Constraining cosmology with weak lensing voids. Monthly Notices of the Royal Astronomical Society, 507(2), 2267-2282. https://doi.org/10.1093/mnras/stab2251

Upcoming surveys such as LSST and EUCLID will significantly improve the power of weak lensing as a cosmological probe. To maximize the information that can be extracted from these surveys, it is important to explore novel statistics that complement s... Read More about Constraining cosmology with weak lensing voids.

Proca-stinated cosmology. Part II. Matter, halo, and lensing statistics in the vector Galileon (2021)
Journal Article
Becker, C., Eggemeier, A., Davies, C. T., & Li, B. (2021). Proca-stinated cosmology. Part II. Matter, halo, and lensing statistics in the vector Galileon. Journal of Cosmology and Astroparticle Physics, 2021(06), Article 014. https://doi.org/10.1088/1475-7516/2021/06/014

The generalised Proca (GP) theory is a modified gravity model in which the acceleration of the cosmic expansion rate can be explained by self interactions of a cosmological vector field. In this paper we study a particular sub-class of the GP theory,... Read More about Proca-stinated cosmology. Part II. Matter, halo, and lensing statistics in the vector Galileon.

Biased Tracer Reconstruction with Halo Mass Information (2021)
Journal Article
Liu, Y., Yu, Y., & Li, B. (2021). Biased Tracer Reconstruction with Halo Mass Information. Astrophysical Journal Supplement, 254(1), Article 4. https://doi.org/10.3847/1538-4365/abe868

Plenty of crucial information about our Universe is encoded in the cosmic large-scale structure (LSS). However, the extractions of these information are usually hindered by the nonlinearities of the LSS, which can be largely alleviated by various tec... Read More about Biased Tracer Reconstruction with Halo Mass Information.

Redshift space power spectrum beyond Einstein-de Sitter kernels (2021)
Journal Article
Aviles, A., Valogiannis, G., Rodriguez-Meza, M. A., Cervantes-Cota, J. L., Li, B., & Bean, R. (2021). Redshift space power spectrum beyond Einstein-de Sitter kernels. Journal of Cosmology and Astroparticle Physics, 2021(04), Article 039. https://doi.org/10.1088/1475-7516/2021/04/039

We develop a framework to compute the redshift space power spectrum (PS), with kernels beyond Einstein-de Sitter (EdS), that can be applied to a wide variety of generalized cosmologies. We build upon a formalism that was recently employed for standar... Read More about Redshift space power spectrum beyond Einstein-de Sitter kernels.

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.

A general framework to test gravity using galaxy clusters III: observable-mass scaling relations in f(R) gravity (2021)
Journal Article
Mitchell, M. A., Arnold, C., & Li, B. (2021). A general framework to test gravity using galaxy clusters III: observable-mass scaling relations in f(R) gravity. Monthly Notices of the Royal Astronomical Society, 502(4), 6101-6116. https://doi.org/10.1093/mnras/stab479

We test two methods, including one that is newly proposed in this work, for correcting for the effects of chameleon f(R) gravity on the scaling relations between the galaxy cluster mass and four observable proxies. Using the first suite of cosmologic... Read More about A general framework to test gravity using galaxy clusters III: observable-mass scaling relations in f(R) gravity.

Vector modes in ΛCDM: the gravitomagnetic potential in dark matter haloes from relativistic N-body simulations (2021)
Journal Article
Barrera-Hinojosa, C., Li, B., Bruni, M., & He, J. (2021). Vector modes in ΛCDM: the gravitomagnetic potential in dark matter haloes from relativistic N-body simulations. Monthly Notices of the Royal Astronomical Society, 501(4), 5697-5713. https://doi.org/10.1093/mnras/staa4025

We investigate the transverse modes of the gravitational and velocity fields in Λ cold dark matter, based on a high-resolution simulation performed using the adaptive-mesh refinement general-relativistic N-body code GRAMSES. We study the generation o... Read More about Vector modes in ΛCDM: the gravitomagnetic potential in dark matter haloes from relativistic N-body simulations.

The impact of modified gravity on the Sunyaev–Zeldovich effect (2020)
Journal Article
Mitchell, M. A., Arnold, C., Hernández-Aguayo, C., & Li, B. (2021). The impact of modified gravity on the Sunyaev–Zeldovich effect. Monthly Notices of the Royal Astronomical Society, 501(3), 4565-4578. https://doi.org/10.1093/mnras/staa3941

We study the effects of two popular modified gravity theories, which incorporate very different screening mechanisms, on the angular power spectra of the thermal (tSZ) and kinematic (kSZ) components of the Sunyaev–Zeldovich effect. Using the first co... Read More about The impact of modified gravity on the Sunyaev–Zeldovich effect.

Baryon acoustic oscillations reconstruction using convolutional neural networks (2020)
Journal Article
Mao, T., Wang, J., Li, B., Cai, Y., Falck, B., Neyrinck, M., & Szalay, A. (2021). Baryon acoustic oscillations reconstruction using convolutional neural networks. Monthly Notices of the Royal Astronomical Society, 501(1), 1499-1510. https://doi.org/10.1093/mnras/staa3741

We propose a new scheme to reconstruct the baryon acoustic oscillations (BAO) signal, which contains key cosmological information, based on deep convolutional neural networks (CNN). Trained with almost no fine tuning, the network can recover large-sc... Read More about Baryon acoustic oscillations reconstruction using convolutional neural networks.

Proca-stinated cosmology. Part I. A N-body code for the vector Galileon (2020)
Journal Article
Becker, C., Arnold, C., Li, B., & Heisenberg, L. (2020). Proca-stinated cosmology. Part I. A N-body code for the vector Galileon. Journal of Cosmology and Astroparticle Physics, 2020(10), https://doi.org/10.1088/1475-7516/2020/10/055

We investigate the nonlinear growth of large-scale structure in the generalised Proca theory, in which a self-interacting massive vector field plays the role of driving the acceleration of the cosmic expansion. Focusing to the Proca Lagrangian at cub... Read More about Proca-stinated cosmology. Part I. A N-body code for the vector Galileon.

Optimal void finders in weak lensing maps (2020)
Journal Article
Davies, C. T., Paillas, E., Cautun, M., & Li, B. (2021). Optimal void finders in weak lensing maps. Monthly Notices of the Royal Astronomical Society, 500(2), 2417-2439. https://doi.org/10.1093/mnras/staa3262

Cosmic voids are a key component of the large-scale structure that contain a plethora of cosmological information. Typically, voids are identified from the underlying galaxy distribution, which is a biased tracer of the total matter field. Previous w... Read More about Optimal void finders in weak lensing maps.

Towards a non-Gaussian model of redshift space distortions (2020)
Journal Article
Cuesta-Lazaro, C., Li, B., Eggemeier, A., Zarrouk, P., Baugh, C. M., Nishimichi, T., & Takada, M. (2020). Towards a non-Gaussian model of redshift space distortions. Monthly Notices of the Royal Astronomical Society, 498(1), 1175-1193. https://doi.org/10.1093/mnras/staa2249

To understand the nature of the accelerated expansion of the Universe, we need to combine constraints on the expansion rate and growth of structure. The growth rate is usually extracted from 3D galaxy maps by exploiting the effects of peculiar motion... Read More about Towards a non-Gaussian model of redshift space distortions.

Iterative removal of redshift space distortions from galaxy clustering (2020)
Journal Article
Wang, Y., Li, B., & Cautun, M. (2020). Iterative removal of redshift space distortions from galaxy clustering. Monthly Notices of the Royal Astronomical Society, 497(3), 3451-3471. https://doi.org/10.1093/mnras/staa2136

Observations of galaxy clustering are made in redshift space, which results in distortions to the underlying isotropic distribution of galaxies. These redshift-space distortions (RSD) not only degrade important features of the matter density field, s... Read More about Iterative removal of redshift space distortions from galaxy clustering.