报告题目：How much cosmological information can be measured?

　　报告人：Yin-Zhe Ma（马寅哲）University of KwaZulu-Natal, South Africa

　　报告人简介：DR. Yin-Zhe Ma servers as a faculty member in University of KwaZulu-Natal, South Africa, and SKA South Africa. His research focuses on observational and theoretical cosmology aiming at understanding the fundamental law of the Universe and uncovering the nature of dark energy and dark matter. The detail research areas are:

　　Radio Cosmology: 21-cm Intensity Mapping, Epoch of Reionization

　　Extragalatic Astronomy: galaxy peculiar velocity field, thermal and kinetic Sunyaev-Zel’dovich effect, dynamics of local group, near-field cosmology

　　The Early Universe: the cosmic microwave background radiation, observational tests of inflation

　　He is currently a member of SKA (Square Kilometer Array) team, Planck Low Frequency Instrument, BINGO experiment (BAO as Integrated Neutral Gas Observation) and 6dFGS (six-degree-Field Galaxy Survey).

　　摘要：Cosmologists' work is to measure the modes of fluctuations in the Universe. The total number of modes one can measure depend on the maximum space that one can observe, and the highest value of perturbation modes one can measure. In this talk, I will give a physical picture of how this “total information” changes in the past and future time, and discuss how many number of modes cosmologists can be measured now, and in the future. In addition, I will discuss how can use the 21-cm intensity mapping technique to map out more structures of the Universe and therefore acquire more information from it, and how the future radio astronomy surveys (FAST, BINGO, CHIME, SKA) can help to pin down the physics of early Universe.

　　时间：6月22日（周三）下午16:00

　　地点：天文楼402会议室

欢迎各位老师、同学参加！

　                                            　南京大学天文与空间科学学院