The 1st IReNA-Ukakuren Joint Workshop “Advancing Professional Development in Nuclear Astrophysics and Beyond”

Session

High Energy Astrophysics

1 Sept 2023, 11:30

Large Seminar Room (Subaru Building) (NAOJ (National Astronomical Observatory of Japan))

Conveners

High Energy Astrophysics: Morning - 2

• Thomas Chillery

22. Nuclear reactions related to very high and ultra-high energy cosmic rays

Eiji Kido (Astrophysical Big Bang Laboratory, RIKEN)

01/09/2023, 11:30

Invited talk

The composition of very high-energy (VHE) and ultra-high energy (UHE) cosmic rays (CRs) was recently measured with higher statistics than before. The results implied that the composition of VHECRs becomes heavier up to $\sim {10}^{17.2}$ eV and lighter above the energy, and the composition of UHECRs becomes lighter up to $\sim {10}^{18.3}$ eV and heavier above the energy. The experimental evidence...

14. Revealing the journey of cosmic rays with petaelectronvolt energies through the observation of sub-PeV gamma rays by the upcoming experiment ALPACA

Dr Sei Kato (Institute for Cosmic Ray Research)

01/09/2023, 12:10

Talk

The ALPACA experiment is an international project between Bolivia, Mexico, and Japan, the prototype of which started data-taking in Bolivia in September 2022. One of the motivations of the experiment is to explore the southern sky in the sub-PeV (E > 10^14 eV) gamma-ray sky to locate astrophysical accelerators of Galactic cosmic rays in the PeV (E > 10^15 eV) range, so-called PeVatrons. The...