Observing the Hot and Energetic X-ray Universe -Exploring the Evolution of Cosmic Matter in Galaxy Clusters-

Galaxy clusters are the most massive gravitationally bound objects in the Universe, and are known as an ideal laboratory for revealing fundamental questions in modern physics and astrophysics, such as, understanding the nature of dark matter and the evolution of visible matter in dark-matter-dominated structures of the Universe. The greatest majority (~ 80%) of the visible matter in a galaxy cluster resides in the diffuse, hot X-ray emitting gas known as the intracluster medium.
Therefore, X-ray observations are the most direct, sensitive approach to find galaxy clusters and study the evolution of visible matter in galaxy clusters. In this talk, I will present my past and present works on observational research of galaxy clusters with primarily X-ray observations to reveal a long-standing problem in modern astrophysics known as the cooling flow problem, which is closely associated with such fundamental questions. In addition, I will present my future plans with new-generation X-ray observatories for a better understanding of the nature of dark matter and the evolution of visible matter. Furthermore, I will present my vision to establish a strong and active research group of X-ray astronomy to explore the hot and energetic X-ray Universe.
Based on my past instrument research for the Hitomi X-ray satellite, I will discuss my ambitions for a Taiwanese astronomical satellite.

Onsite+Online(via webex): https://nckucc.webex.com/nckucc/j.php?MTID=m4d5f565ab59a8033dffb3b19e5565397