【12.29; Seminar】2025年粒子天体物理全国重点实验室系列学术报告 #41：Preparation for multi-tracer cosmology

时间/Time: 12月29日周一上午10:00/Monday, December 29, 10:00 a.m.

地点/Location: :主楼418会议室/Meeting Room 418, Main Building

报告人/Speaker: 高祖铖（法国科学研究中心）

题目/Title: Preparation for multi-tracer cosmology

主持人/Host: 舒诗博

腾讯会议：806-299-3324

摘要/Abstract: 

The LCDM model has provided a remarkably successful framework for understanding cosmic evolution, yet some of the most profound questions in physics remain open: What is the nature of dark matter and dark energy? How were primordial fluctuations generated? And how the galaxy formation physics influences our understanding of cosmological constraints?

Forthcoming surveys—including DESI, Euclid, SPHEREx, the Simons Observatory, and CMB-S4—will deliver data capable of testing these questions with unprecedented statistical power. Great potential of improving our understanding of both cosmology and astrophysics lies in the cross-correlation of different surveys, which can effectively reduce individual systematics. Realising this potential requires fast, accurate and realistic modelling tools that enables the joint-analysis of different surveys.

In this talk, I will present a suite of methods developed to address this challenge. These include an efficient forward-modelling formalism for angular statistics in large-scale structure, and simulation-based forward modelling for line intensity mapping (LIM). Together, these tools help bridge the gap between fundamental theory and the rich observational landscape of the next decade.

个人简介/Biography: 

高祖铖现于法国科学研究中心(CNRS) 从事博士后工作。2024年博士毕业于英国剑桥大学天文系，2020年本科毕业于北京大学物理学院。在2019-2021年分别于加州理工学院，北京大学科维理天文与天体物理研究所从事研究助理工作。目前研究方向为大尺度结构宇宙学，通过理论计算和数值模拟，分析星系巡天(galaxy clustering)，微波背景辐射(CMB)以及谱线强度映射(LIM)中的两点以及高维关联函数，进而研究早期宇宙物理，以及宇宙演化。