Title：Cosmic magnetism: magnetic fields and polarized emission from galaxy clusters and large-scale structures

  　Speaker：Kinwah Wu (University College London, UK; Visiting Professor)

　　Abstract：Magnetic fields are present everywhere in the Universe, from sub-stellar and stellar systems to large-scale structures, such as cosmic filaments, walls and voids. While we have some understanding of the properties of stellar-scale magnetic fields, our knowledge of magnetic fields beyond galactic scales is very primitive. The situation will however improve, with the coming of new instruments, in particular, the SKA and its precursors. In this talk I shall first present an overview of cosmic magnetism. Then I shall show results of recent studies of large-scale magnetic fields of my collaboration. The first is on the MHD simulations of the evolution of magnetic fields in galaxy clusters and large-scale structures. The second is on using polarized radiation as a diagnostic tools. I shall discuss how these and related studies will help to improve our understanding of the properties, evolution and origin of the cosmic magnetic fields. I will also discuss certain conceptual and technical challenges that we face and difficulties and obstacles that we need to overcome in order to gain proper understanding of large-scale cosmic magnetism.

　　Time：11th Dec. (Friday), 10:00am

　　Place：Room 212, Astronomy Building

欢迎各位老师、同学参加！

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