NPAC (Nuclear/Particle/Astro/Cosmo) Forums |
Organized by: Prof. Lu Lu
Events During the Week of April 14th through April 21st, 2024
Monday, April 15th, 2024
- No events scheduled
Tuesday, April 16th, 2024
- No events scheduled
Wednesday, April 17th, 2024
- No events scheduled
Thursday, April 18th, 2024
- Hunting for Galactic PeVatrons in the X-ray Regime
- 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
Friday, April 19th, 2024
- No events scheduled