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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-8594
DTSTART:20240418T193000Z
DTEND:20240418T203000Z
DTSTAMP:20260413T223602Z
LAST-MODIFIED:20240418T172318Z
LOCATION:CH 5310 / https://uwmadison.zoom.us/j/98345257537?pwd=OXZoS1Z
 HOUZjNWN5UnFEU0hSQm1SQT09
SUMMARY:Hunting for Galactic PeVatrons in the X-ray Regime\, NPAC (Nuc
 lear/Particle/Astro/Cosmo) Forum\, Shuo Zhang\, MSU
DESCRIPTION: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 t
 he center of our galaxy\, which suggests that the supermassive black h
 ole Sgr A* may be responsible. Despite being one of the least active s
 upermassive black holes\, Sgr A* may have acted as a potential particl
 e accelerator during its active stage in the past. In this talk\, I wi
 ll describe our attempts to find multi-wavelength observational eviden
 ce that Sgr A* used to be a PeVatrons\, as well as how we can reconstr
 uct Sgr A* activity history in the past few million years. I will also
  introduce our ongoing observational efforts to identify other Galacti
 c PeVatron candidates discovered by LHAASO and to test whether they be
 ar a nature of supernova remnants\, pulsar wind nebula or else.
URL:https://www.physics.wisc.edu/events/?id=8594
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