Outputs (16)

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.

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.

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.

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.

The modified gravity light-cone simulation project – I. Statistics of matter and halo distributions (2018)
Journal Article
Arnold, C., Fosalba, P., Springel, V., Puchwein, E., & Blot, L. (2019). The modified gravity light-cone simulation project – I. Statistics of matter and halo distributions. Monthly Notices of the Royal Astronomical Society, 483(1), 790-805. https://doi.org/10.1093/mnras/sty3044

We introduce a set of four very high resolution cosmological simulations exploring f(R) gravity, with 20483 particles in 768 and 1536h−1Mpc simulation boxes, for |f¯R0|=10−5 and Λ cold dark matter (ΛCDM), making the set the largest simulations of f(R... Read More about The modified gravity light-cone simulation project – I. Statistics of matter and halo distributions.

Imprints of Chameleon f(R) Gravity on Galaxy Rotation Curves (2018)
Journal Article
Naik, A. P., Puchwein, E., Davis, A.-C., & Arnold, C. (2018). Imprints of Chameleon f(R) Gravity on Galaxy Rotation Curves. Monthly Notices of the Royal Astronomical Society, 480(4), 5211-5225. https://doi.org/10.1093/mnras/sty2199

Current constraints on gravity are relatively weak on galactic and intergalactic scales. Screened modified gravity models can exhibit complex behaviour there without violating stringent tests of gravity within our Solar System. They might hence provi... Read More about Imprints of Chameleon f(R) Gravity on Galaxy Rotation Curves.