2 papers
astro-ph.HE2026
On the Possibility of an Extragalactic Positron Annihilation Signal
Thomas Siegert, Hiroki Yoneda
With 20 years of INTEGRAL/SPI observations, Yoneda et al. (2025) created the most detailed map of the positron annihilation line at 511keV. While central bulge and extended disk ar…
astro-ph.HE2025
Possible evidence for the 478 keV emission line from Be decay during the outburst phases of V1369 Cen
L. Izzo, T. Siegert, P. Jean +4
After decades of uncertainty about the origin of lithium, recent evidence suggests Galactic novae as its main astrophysical source. In this work, we present possible evidence for t…