| Number | R1-1 / IPMU/ILANCE/ICRR joint seminar |
| Date&Time | JST 15:00-, Wed, April 2, 2025 |
| Place | ICRR 6F Large seminar room Zoom: https://u-tokyo-ac-jp.zoom.us/j/88957591096?pwd=jjabwv3Xml6kqngFKnDKGc0gvdJBM1.1 |
| Speaker | Kaya Mori (Columbia University) |
| Title | “Multi-wavelength Observations of Galactic PeVatrons” |
| Abstract | The recent discovery of over 40 ultra-high-energy (UHE; > 100 TeV) gamma-ray sources and neutrino emission in the Galactic Plane has provided strong evidence for Galactic PeVtrons, which are capable of accelerating particles to PeV energies. These discoveries marked a significant paradigm shift in high-energy astrophysics and astroparticle physics from “Do PeVatrons exist in our galaxy?” to “What are the Galactic PeVatrons?” As highlighted in previous studies of Galactic TeV sources, multi-wavelength observations play a crucial role in identifying PeVatrons and particle acceleration mechanisms, for example, by characterizing synchrotron emission from primary and secondary TeV-PeV electrons. In particular, a combination of broadband spectral energy distribution (SED) and morphological data in the X-ray and TeV bands is a powerful tool for probing their particle acceleration and emission mechanisms. This presentation will review the latest multi-wavelength studies of Galactic PeVatron candidates, primarily focusing on X-ray observations in conjunction with radio, GeV, and TeV data. Key topics include: (1) multi-epoch NuSTAR hard X-ray observations of young supernova remnants, (2) multi-wavelength observations of pulsar wind nebulae associated with UHE sources, (3) X-ray investigations of new PeVatron classes (e.g., microquasar jets), (4) X-ray surveys of the Galactic Center, and (5) searches for X-ray counterparts of unidentified or “dark” Galactic PeVatrons. Finally, I will discuss the future prospects of X-ray astrophysics in advancing our understanding of Galactic PeVatrons. |
