Carolina Cuesta-Lazaro
April 2022 - Britgrav
FORGE Collaboration: Christian Arnold, Benjamin Giblin, Joachim Harnois-Deraps, Yan-Chuan Cai, Cesar Hernandez-Aguayo, Chris Davies, Enrique Paillas, Cheng-Zong Ruan and Baojiu Li
Space-time
geometetry
Energy content
Adding new degrees of freedom
GRAVITATIONAL ACTIONS
N-BODY SIMULATIONS
LIKELIHOOD
LARGE SCALE STRUCTURE DATA
DESI,Euclid ...
GRAVITATIONAL ACTIONS
N-BODY SIMULATIONS
LIKELIHOOD
LARGE SCALE STRUCTURE DATA
DESI,Euclid ...
DESI
Spectroscopic
30+ million redshifts
Credit: D. Schlegel/Berkeley Lab using data from DESI
EUCLID
Imaging
15,000 square degrees out to redshift z=2
arxiv:2109.04984
nDGP
Can match expansion to LCDM
Screening mechanisms to pass solar system tests
Do not modify speed of gravitational wave propagation
Need a "cosmological constant"
f(R)
FORGE: F(R)
BRIDGE: nDGP
More models coming soon!
MG-GLAM x100 faster than MG-Arepo
arxiv:2110.00328
arxiv:2110.00566
arxiv:2109.04984
2-POINT STATISTICS
arxiv:2109.04984
Credit: https://cs231n.github.io/convolutional-networks/
FORGE collaboration (in prep)
Harnois-Deraps et al (in prep)
What is the impact of baryons on small scales?
Are there degeneracies with other cosmological parameters that would alter our constraints?