All Outputs (4)

Modelling the tightest relation between galaxy properties and dark matter halo properties from hydrodynamical simulations of galaxy formation (2020)
Journal Article
He, J.-H. (2020). Modelling the tightest relation between galaxy properties and dark matter halo properties from hydrodynamical simulations of galaxy formation. Monthly Notices of the Royal Astronomical Society, 493(3), 4453-4462. https://doi.org/10.1093/mnras/staa620

We investigate how a property of a galaxy correlates most tightly with a property of its host dark matter halo, using state-of-the-art hydrodynamical simulations of galaxy formation: EAGLE, Illustris, and IllustrisTNG. Unlike most of the previous wor... Read More about Modelling the tightest relation between galaxy properties and dark matter halo properties from hydrodynamical simulations of galaxy formation.

Accurate method to determine the systematics due to the peculiar velocities of galaxies in measuring the Hubble constant from gravitational-wave standard sirens (2019)
Journal Article
He, J.-H. (2019). Accurate method to determine the systematics due to the peculiar velocities of galaxies in measuring the Hubble constant from gravitational-wave standard sirens. Physical Review D, 100(2), Article 023527. https://doi.org/10.1103/physrevd.100.023527

We propose a novel approach to accurately pin down the systematics due to the peculiar velocities of galaxies in measuring the Hubble constant from nearby galaxies in current and future gravitational-wave (GW) standard-siren experiments. Given the pr... Read More about Accurate method to determine the systematics due to the peculiar velocities of galaxies in measuring the Hubble constant from gravitational-wave standard sirens.

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.

No evidence for modifications of gravity from galaxy motions on cosmological scales (2018)
Journal Article
He, J., Guzzo, L., Li, B., & Baugh, C. M. (2018). No evidence for modifications of gravity from galaxy motions on cosmological scales. Nature Astronomy, 2(12), 967-972. https://doi.org/10.1038/s41550-018-0573-2

Current tests of general relativity (GR) remain confined to the scale of stellar systems or the strong gravity regime. A departure from GR on cosmological scales has been advocated1 as an alternative to the cosmological constant Λ (ref. 2) to account... Read More about No evidence for modifications of gravity from galaxy motions on cosmological scales.