Title: Physics and Observations of Pulsar Wind Nebulae

Speaker: Stephen Chi-Yung Ng（Hongkong University）

Time: 14:00pm, March 7, 2025

Location: 3-302, PMO Xianlin Campus

Abstract: When pulsars spin down, most of their rotational energy is carried away by relativistic particle outflow known as pulsar wind. The interaction between the wind and the ambient medium results in a termination shock, where the particles are accelerated up to PeV energies. These ultra-relativistic particles then inflate a bubble in the medium and emit synchrotron and inverse-Compton radiation from radio to X-rays to gamma-rays. Such a structure is referred to as a pulsar wind nebula (PWN). PWNe are important high energy sources in the Galaxy. They offer the best laboratories for studying relativistic shocks and the production of cosmic rays. In this talk, I will give a general overview of PWNe and highlight some recent results from multi-wavelength observations.