NPAC (Nuclear/Particle/Astro/Cosmo) Forums

<< Fall 2023 Spring 2024 Summer 2024 >>
Subscribe your calendar or receive email announcements of events

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
Add this event to your calendar

Friday, April 19th, 2024

No events scheduled