5 papers
Non-parametric exploration of minimally coupled gravity with phantom crossing
Matteo Cataneo, Kazuya Koyama
Recent measurements of the baryon acoustic oscillations by the Dark Energy Spectroscopic Instrument (DESI), especially when combined with cosmic microwave background (CMB) and supe…
A field-level reaction for screened modified gravity
Daniela Saadeh, Kazuya Koyama, Xan Morice-Atkinson
We present a field-level reaction framework to emulate the nonlinear effects of screened modified gravity on the cosmic web. This approach is designed to enable field-level inferen…
Using a minimally parametrised SHAM to constrain the link between dark matter and galaxies
F. L. Davidson, D. Bacon, A. Amara +6
Models of the galaxy-halo connection are needed to understand both galaxy clusters and large scale structure. To make said models, we need a robust method that assigns galaxies to…
A field-level emulator for modified gravity
Daniela Saadeh, Kazuya Koyama, Xan Morice-Atkinson
Stage IV surveys like LSST and Euclid present a unique opportunity to shed light on the nature of dark energy. However, their full constraining power cannot be unlocked unless accu…
Extending MGCAMB tests of gravity to nonlinear scales
Zhuangfei Wang, Daniela Saadeh, Kazuya Koyama +4
Modified Growth with {\tt CAMB} ({\tt MGCAMB}) is a patch for the Einstein-Boltzmann solver {\tt CAMB} for cosmological tests of gravity. Until now, {\tt MGCAMB} was limited to sca…