The Large-scale Structure of the Universe: Probes of Cosmology and Structure Formation

by Dr Qianli Xia (the University of Edinburgh)

Friday 30 Oct 2020, 16:00 → 17:00 Asia/Shanghai

TDLI Meeting Room 202

Abstract

With existing and ongoing large galaxy surveys, new questions in the study of large scale structure need be addressed. It includes the challenge of studying the less dense regions in the cosmic web, such as filaments, as well as the quest for new constraints on cosmological parameters and modified gravity theory. In this talk, I present a weak lensing detection of filaments in the cosmic web, combining data from the KiDS-VIKING-450 survey, the Red Cluster Sequence Lensing Survey and the Canada--France--Hawaii Lensing Survey. I will also present an analysis on the departure from General Relativity in the context of the Hu-Sawicki functional form of f(R) gravity using the DES Y1 cluster abundance data. While these work are motivated by analysis of DES Y1 and KiDS dataset, they are applicable to future surveys, such as LSST and CSST.

Biography

2017-2020 ERC funded PhD in Observational Cosmology, University of Edinburgh, Supervisor: Prof. Catherine Heymans
 2014-2017 PhD Candidate, Purple Mountain Observatory, Supervisor: Prof. Xi Kang
 2012-2013 MSci, University of Cambridge, UK
 2009-2012 BA (Hon), University of Cambridge, UK

Division

Astronomy and Astrophysics