报告题目：Scalaron Field in F(R) Gravity and Its Phenomenology

报  告 人：桂川大志 副教授，华中师范大学

研究方向：宇宙学和天体物理学

报告时间：2025年6月17日（星期二）下午16:00

报告地点：量子楼410报告厅

报告摘要：

F(R) gravity theory, one of the modified gravity theories, predicts a new fundamental scalar field called scalaron. It is known that the scalaron field can be the origin of dark energy to explain the accelerated expansion of the current Universe. The scalaron field has a unique feature called the chameleon mechanism, and the chameleon mechanism plays an important role to hide the scalaron field in local tests of gravity. This talk reviews such a chameleon field theory and its applications to the early Universe, astrophysics, and particle physics.

报告人简介：

Dr. Taishi Katsuragawa received his Ph.D. from Nagoya University in 2017. After working in postdoctoral researcher positions at Kobayashi-Maskawa Institute and Central China Normal University, he joined in Institute of Astrophysics of Central China Normal University as a faculty member. His research interests are applications of modified gravity theory to the dark energy and dark matter from viewpoints of cosmology and astrophysics.