Title : Cosmology with high-redshift (z>1) galaxy surveys

Speaker : 정동희 교수님 (Prof. Donghui Jeong)

Date & Time : 2022.04.08 (Fri) 10:30 AM

Location : Online (https://yonsei.zoom.us/j/97961867951?pwd=cTVyNUtlV0ZKUWFrQXZCODVVT1VRdz09, PASSWORD:astrograd, It will be open at 10:00) * 문의: 정애리 교수, achung@yonsei.ac.kr

Abstract

Thanks to various observation campaigns over the past two decades, we have determinedthe most concordance Lambda-CDM cosmology parameters to sub-percent precision.The precision, however, does not guarantee the accuracy of the model. For example,the nature of 95 percent of the Lambda-CDM cosmology is unknown to us; hence, nameddark matter and dark energy. The precision measurements also reveal tensions betweencosmological parameters estimated from different probes, notably the Hubble parametermeasured from the CMB versus the local observations. Again, the accurate cosmologymodel should come from observations, and the high-redshift (z>1) galaxy surveys are atthe frontier. In this talk, I will show how we clarify the physical cosmology from largescale-structure traced by high-redshift (z>1) galaxies and what is required to exploit thecosmological information buried in galaxies' nonlinear clustering.* Talk to be delivered in English

Biography

2020 - current    Professor (part-time), Korea Institute for Advanced Study

2020 - current    Associate Professor, Eberly College of Science, The Pennsylvania State Univ.

2014 - 2020        Assistant Professor, Eberly College of Science, The Pennsylvania State Univ.

2011 - 2014        Postdoctoral Scholar, Center for Astrophysical Sciences, Johns Hopkins Univ.

2010 – 2011       Robinson Postdoctoral Scholar in Theoretical Cosmology, CalTech

2005 - 2010        Ph.D. Astronomy, The University of Texas at Austin2002 B.A. Physics, KAIST