报告题目：Polarimetry of acceleration phenomena in PWN and SNR
Pulsar wind nebulae (PWN) and supernova remnants (SNR) are powerful sources of non-thermal X-ray radiation, which is intrinsically polarized due to synchrotron emission. The magnetic field strength and structure in these sources play a crucial role in shaping their dynamics, energetics and evolution, as well as in accelerating particles to very high energies. However, many aspects of the magnetic field configuration and the acceleration mechanisms are still poorly understood. X-ray polarimetry can provide unique insights into these open questions by probing the local orientation and degree of order of the magnetic field, as well as the distribution and spectrum of the emitting particles. In this talk, I will review the current status and future prospects of X-ray polarimetry applied to extended source PWN and SNR, with a focus on the Imaging X-ray Polarimetry Explorer (IXPE) mission, which is a NASA/ASI explorer launched in December 2021. I will present the polarization results of IXPE observations of classical PWN and SNR, such as the Crab nebula, Vela nebula, Cas A, and Tycho. I will also discuss how X-ray polarimetry can complement other wavelength observations, especially in the gamma-ray domain, where PWN and SNR are among the most abundant sources.
Prof. Fei Xie obtained her Bachelor in Physics in 2011, PhD degree in Astrophysics in 2016 at University of Chinese Academic of Sciences. She was a postdoc at the KTH Royal Institute of Technology in Sweden and INAF/IAPS (Istituto di Astrofisica e Planetologia Spaziali) in Italy. In 2021, she joined Guangxi University and is now a professor at School of Physical Science and Technology. She works mainly on X-ray polarization detection technology and high energy astrophysics like pulsar wind nebula.