Radiative plasmas in pulsar magnetospheres - Alexander Chernoglazov - 03/07/2025

This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach channel: https://youtube.com/c/caltechastro

Date: 03/07/2025
Speaker: Alexander Chernoglazov - Institute for Advanced Study
Title: Radiative plasmas in pulsar magnetospheres
Abstract:
Pulsars are highly magnetized rotating neutron stars known for their periodic bursts of radio emission. Decades of astronomical observations revealed that pulsars produce non-thermal radiation in all energy bands, from radio to gamma rays, covering more than 20 decades in photon energy.  In my talk, I will cover a variety of physical processes in immediate surroundings - magnetospheres - of neutron stars that can be responsible for plasma production and the observed emission in the wide range of photon energies, from fractions of eV to TeV. I will demonstrate how accurate modeling of radiative processes in relativistic current sheets can explain the observed emission above theoretical burnoff limit of 16 MeV, and how the mutual interaction of the different regions of the magnetosphere is responsible for generation of extremely energetic photons in the energy range of tens of teraelectronvolt.

Видео Radiative plasmas in pulsar magnetospheres - Alexander Chernoglazov - 03/07/2025 канала Caltech Astro Seminars