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Abstract:
Multi-messenger observations, encompassing photons, neutrinos, cosmic rays, and gravitational waves, provide complementary perspectives for investigating high-energy astrophysical phenomena and addressing fundamental questions in astrophysics. Compact stars and their associated relativistic outflows often serve as the central engines powering these extreme events. In this talk, I will discuss two key topics in multi-messenger astrophysics. First, I will examine electromagnetic counterparts arising during the inspiral phase of neutron star mergers, with a particular focus on magnetospheric interactions and their multi-wavelength emission signatures. These early-time signals can potentially constrain post-merger remnant, provide extra information for the binary orbital decay for gravitational wave study, and improve the efficiency of multi-messenger follow-up strategies. Second, I will investigate relativistic jets from active galactic nuclei and X-ray binaries as potential sources of very- and ultra-high-energy cosmic rays. The origin of cosmic rays remains one of the longstanding questions in astrophysics. I will introduce a framework based on turbulent shear acceleration for jets, which provides a self-consistent explanation for both the observed multi-wavelength spectra of these systems and the acceleration of cosmic rays to the highest energies. Finally, I will discuss some new astrophysical phenomena and their potential role in multi-messenger astrophysics.
Bio:
Jieshuang Wang obtained his PhD in 2018 in Nanjing University. After completing his PhD, he joined the TDLI as a postdoctoral fellow. From 2021 to 2024, he was awarded an Alexander von Humboldt Fellowship and worked at the Max Planck Institute for Nuclear Physics in Germany. Since June 2024, he has been a postdoctoral researcher at the Max Planck Institute for Plasma Physics. His primary research focuses on high-energy astrophysics, particularly phenomena involving compact stars such as accreting black holes, neutron star binaries, and magnetars. He investigates dynamics, particle acceleration, and multi-messenger radiation through both analytical modeling and numerical simulations. He has authored more than 50 publications, which have collectively received over 2,000 citations.
Host: Pengjie Zhang
Tencent Link: https://meeting.tencent.com/dm/4yM9uJaKb80Q