Ponente
Descripción
We present the first gamma-ray study of X-ray selected AGN in dwarf galaxies, using 15 years of Fermi-LAT data. These low-mass systems likely host intermediate-mass black holes and offer a unique view into accretion and feedback in the faintest galactic nuclei, as well as a new window into the properties of dark matter. While no individual source is detected, a joint likelihood analysis of 74 eROSITA-selected dwarfs reveals an indication of a soft-spectrum excess. This marginal signal may point to low-efficiency jet or corona-driven gamma-ray emission, distinct from processes observed in their more massive AGN counterparts. We also consider dark matter annihilation in density spikes as a speculative but intriguing contributor to the soft gamma-ray signal. These results suggest that dwarf AGN, the littlest gamma-ray galaxies, may host new windows into both high-energy astrophysics and beyond-standard-model physics.
