Topic: MEASURING ANGULAR DIAMETER DISTANCES OUT TO $z~10$ WITH THE COSMIC INFRARED BACKGROUND FLUCTUTATIONS

Speaker: Fernando Atrio Barandela, University of Salamanca (西班牙萨拉曼卡大学)

Time: 14:30, May 29, 2019

Venue: Building 8 room N110

Abstract:

The Cosmic Infrared Background (CIB) contains emissions from the first stars and first black holes. Lyman-break tomography applied to source subtracted images from Euclid can isolate the CIB emissions at redshifts $10\le z\le 20$ and to identify the baryon acoustic oscillations (BAOs) at those epochs even if the data contain only a small fraction from high redshift sources. Probing BAOs at those redshifts is an important self-consistency check of the cosmological paradigm and the derived angular diameter distanteces will reduce the uncertainty on the evolution of  the dark energy. Data from the complementary WFIRST mission would add a fourth channel to the near-IR and would reduce uncertainties even further.

Fernando Atrio Barandela 教授简介：

Fernando Atrio Barandela教授是西班牙萨拉曼卡大学理论宇宙学教授。萨拉曼卡大学是世界上最古老的三所大学之一，距今已有800多年历史。萨拉曼卡大学理论宇宙学研究享誉世界。Fernando Atrio Barandela教授是国际著名的宇宙学家，他参加欧洲Planck宇宙微波背景辐射探测计划，任第五工作组组长，承担Sunyaev-Zel’dovich效应的科学研究；他同时也参加欧洲Euclid合作计划，开展对深空科学的探索。