Multiple probes of gravity from large-scale structure
Abstract:
Test of general relatively on cosmological scales is essential but challenging. One possible way is to constrain the growth of structure at the percent-level. I will show that this may be achievable by combining redshift-space distortions with weak gravitational lensing. Alternatively, I will show that cosmic voids are very sensitive probes to certain types of modify gravity, but probing the emptiness of voids is challenging. I will show that stacking of voids for the integrated Sachs-Wolfe signal can overcome the challenge, and provides an independent probe for gravity.