Abstract Details

Name: Surhud More
Affiliation: IUCAA
Conference ID: ASI2020_53
Title : Cosmological constraints from weak lensing surveys
Authors and Co-Authors : Hyper Suprime-Cam Survey Collaboration
Abstract Type : Invited
Abstract Category : Plenary
Abstract : The growth of large scale structure in the Universe is a result of the tug-of-war between the effects of dark matter and dark energy. Current and upcoming large galaxy imaging surveys are aimed at mapping this growth of structure to learn about dark matter and dark energy. Gravitational lensing, the bending of light due to gravity, induces tiny distortions in the shapes of the observed galaxies. These tiny distortions can be used to reconstruct a tomographic map of the matter distribution. I will report on the cosmological constraints on the matter density parameter and the amplitude of density fluctuations from the ongoing weak lensing surveys, in particular, the Hyper Suprime-Cam Survey conducted from the Subaru telescope. I will discuss the implications of these results. I will also briefly discuss the upcoming Large Synoptic Survey Telescope and how it will revolutionize the field in the coming decade.