All Outputs (12)

Galaxy infall kinematics as a test of modified gravity (2014)
Journal Article
Zu, Y., Weinberg, D., Jennings, E., Li, B., & Wyman, M. (2014). Galaxy infall kinematics as a test of modified gravity. Monthly Notices of the Royal Astronomical Society, 445(2), 1885-1897. https://doi.org/10.1093/mnras/stu1739

Infrared modifications of General Relativity (GR) can be revealed by comparing the mass of galaxy clusters estimated from weak lensing to that from infall kinematics. We measure the 2D galaxy velocity distribution in the cluster infall region by appl... Read More about Galaxy infall kinematics as a test of modified gravity.

Revisiting the screening mechanism in f(R) gravity (2014)
Journal Article
He, J., Li, B., Hawken, A., & Granett, B. (2014). Revisiting the screening mechanism in f(R) gravity. Physical Review D, 90, Article 103505. https://doi.org/10.1103/physrevd.90.103505

We reexamine the screening mechanism in f(R) gravity using N-body simulations. By explicitly examining the relation between the extrascalar field δfR and the gravitational potential ϕ in the perturbed Universe, we find that the relation between these... Read More about Revisiting the screening mechanism in f(R) gravity.

Nonlinear structure formation in Nonlocal Gravity (2014)
Journal Article
Barreira, A., Li, B., Hellwing, W., Baugh, C., & Pascoli, S. (2014). Nonlinear structure formation in Nonlocal Gravity. Journal of Cosmology and Astroparticle Physics, 2014(09), Article 031. https://doi.org/10.1088/1475-7516/2014/09/031

We study the nonlinear growth of structure in nonlocal gravity models with the aid of N-body simulation and the spherical collapse and halo models. We focus on a model in which the inverse-squared of the d'Alembertian operator acts on the Ricci scala... Read More about Nonlinear structure formation in Nonlocal Gravity.

The observational status of Galileon gravity after Planck (2014)
Journal Article
Barreira, A., Li, B., Baugh, C., & Pascoli, S. (2014). The observational status of Galileon gravity after Planck. Journal of Cosmology and Astroparticle Physics, 2014(08), Article 059. https://doi.org/10.1088/1475-7516/2014/08/059

We use the latest CMB data from Planck, together with BAO measurements, to constrain the full parameter space of Galileon gravity. We constrain separately the three main branches of the theory known as the Cubic, Quartic and Quintic models, and find... Read More about The observational status of Galileon gravity after Planck.

The Vainshtein mechanism in the cosmic web (2014)
Journal Article
Falck, B., Koyama, K., Zhao, G., & Li, B. (2014). The Vainshtein mechanism in the cosmic web. Journal of Cosmology and Astroparticle Physics, 2014(07), Article 058. https://doi.org/10.1088/1475-7516/2014/07/058

We investigate the dependence of the Vainshtein screening mechanism on the cosmic web morphology of both dark matter particles and halos as determined by ORIGAMI. Unlike chameleon and symmetron screening, which come into effect in regions of high den... Read More about The Vainshtein mechanism in the cosmic web.

Modified gravity with massive neutrinos as a testable alternative cosmological model (2014)
Journal Article
Barreira, A., Li, B., Baugh, C., & Pascoli, S. (2014). Modified gravity with massive neutrinos as a testable alternative cosmological model. Physical Review D, 90(2), Article 023528. https://doi.org/10.1103/physrevd.90.023528

We show that, in the presence of massive neutrinos, the Galileon gravity model provides a very good fit to the current cosmic microwave background (CMB) temperature, CMB lensing and baryonic acoustic oscillation data. This model, which we dub νGalile... Read More about Modified gravity with massive neutrinos as a testable alternative cosmological model.

Clear and measurable signature of modified gravity in the galaxy velocity field (2014)
Journal Article
Hellwing, W., Barreira, A., Frenk, C., Li, B., & Cole, S. (2014). Clear and measurable signature of modified gravity in the galaxy velocity field. Physical Review Letters, 112(22), Article 221102. https://doi.org/10.1103/physrevlett.112.221102

The velocity field of dark matter and galaxies reflects the continued action of gravity throughout cosmic history. We show that the low-order moments of the pairwise velocity distribution, v 12 , are a powerful diagnostic of the laws of gravity on co... Read More about Clear and measurable signature of modified gravity in the galaxy velocity field.

Mechanotransduction in the muscle spindle (2014)
Journal Article
Bewick, G. S., & Banks, R. W. (2015). Mechanotransduction in the muscle spindle. Pflügers Archiv European Journal of Physiology, 467(1), 175-190. https://doi.org/10.1007/s00424-014-1536-9

The focus of this review is on the principal sensory ending of the mammalian muscle spindle, known as the primary ending. The process of mechanosensory transduction in the primary ending is examined under five headings: (i) action potential responses... Read More about Mechanotransduction in the muscle spindle.

Halo model and halo properties in Galileon gravity cosmologies (2014)
Journal Article
Barreira, A., Li, B., Hellwing, W., Lombriser, L., Baugh, C., & Pascoli, S. (2014). Halo model and halo properties in Galileon gravity cosmologies. Journal of Cosmology and Astroparticle Physics, 2014(04), Article 029. https://doi.org/10.1088/1475-7516/2014/04/029

We investigate the performance of semi-analytical modelling of large-scale structure in Galileon gravity cosmologies using results from N-body simulations. We focus on the Cubic and Quartic Galileon models that provide a reasonable fit to CMB, SNIa a... Read More about Halo model and halo properties in Galileon gravity cosmologies.

The Integrated Sachs-Wolfe effect in f(R) gravity (2014)
Journal Article
Cai, Y., Li, B., Cole, S., Frenk, C., & Neyrinck, M. (2014). The Integrated Sachs-Wolfe effect in f(R) gravity. Monthly Notices of the Royal Astronomical Society, 439(3), 2978-2989. https://doi.org/10.1093/mnras/stu154

We study the late-time integrated Sachs–Wolfe (ISW) effect in f(R) gravity using N-body simulations. In the f(R) model under study, the linear growth rate is larger than that in general relativity (GR). This slows down the decay of the cosmic potenti... Read More about The Integrated Sachs-Wolfe effect in f(R) gravity.

Massive gravity wrapped in the cosmic web (2014)
Journal Article
Shim, J., Lee, J., & Li, B. (2014). Massive gravity wrapped in the cosmic web. Astrophysical Journal, 784(1), Article 84. https://doi.org/10.1088/0004-637x/784/1/84

We study how the filamentary pattern of the cosmic web changes if the true gravity deviates from general relativity (GR) on a large scale. The f(R) gravity, whose strength is controlled to satisfy the current observational constraints on the cluster... Read More about Massive gravity wrapped in the cosmic web.

Halo modelling in chameleon theories (2014)
Journal Article
Lombriser, L., Koyama, K., & Li, B. (2014). Halo modelling in chameleon theories. Journal of Cosmology and Astroparticle Physics, 2014(03), Article 021. https://doi.org/10.1088/1475-7516/2014/03/021

We analyse modelling techniques for the large-scale structure formed in scalar-tensor theories of constant Brans-Dicke parameter which match the concordance model background expansion history and produce a chameleon suppression of the gravitational m... Read More about Halo modelling in chameleon theories.