Events at Physics

<< Fall 2023 Spring 2024 Summer 2024 >>
Subscribe your calendar or receive email announcements of events
NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Hunting for Galactic PeVatrons in the X-ray Regime
Date: Thursday, April 18th
Time: 2:30 pm - 3:30 pm
Place: CH 5310 /
Speaker: Shuo Zhang, MSU
Abstract: Cosmic rays with energies up to a few PeV are believed to originate from our own galaxy. However, the origin of Galactic cosmic-rays has remained a mystery for over a century since their discovery. The H.E.S.S. observatory discovered a PeVatron within 10 parsecs of the center of our galaxy, which suggests that the supermassive black hole Sgr A* may be responsible. Despite being one of the least active supermassive black holes, Sgr A* may have acted as a potential particle accelerator during its active stage in the past. In this talk, I will describe our attempts to find multi-wavelength observational evidence that Sgr A* used to be a PeVatrons, as well as how we can reconstruct Sgr A* activity history in the past few million years. I will also introduce our ongoing observational efforts to identify other Galactic PeVatron candidates discovered by LHAASO and to test whether they bear a nature of supernova remnants, pulsar wind nebula or else.
Host: Lu Lu
Add this event to your calendar