5 papers · 1 filter
Disentangling modified gravity and galaxy bias with field-level inference
Sophie Hoyland, Daniela Saadeh, Kazuya Koyama +1
We present a field-level inference framework for testing gravity with the large-scale structure that exploits the full information content of the galaxy distribution. Traditional a…
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…
Fast Generation of Weak Lensing Maps in Modified Gravity with COLA
Sophie Hoyland, Hans A. Winther, Daniela Saadeh +2
Accurate predictions of weak lensing observables are essential for understanding the large-scale structure of the Universe and probing the nature of gravity. In this work, we prese…
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…