2 papers
astro-ph.HE2026
A self-consistent explanation of the MeV line in GRB 221009A unveils a dense circum-stellar medium
O. S. Salafia, A. Celotti, E. Sobacchi +6
GRB~221009A has been the brightest gamma-ray burst (GRB) observed to date, and its afterglow has been characterized with unprecedented detail at TeV energies by LHAASO. Quite puzzl…
astro-ph.HE2025
NVSS J151002+570243: accretion and spin of a z > 4 Fermi detected blazar
Gabriele Alzati, Tullia Sbarrato, Gabriele Ghisellini
Active galactic nuclei formation and evolution is currently an open puzzle. Their enormous mass is not explainable via sub-Eddington accretion and the frequent presence of relativi…