Gamma-Ray Detection Prospects for Ultra-Fast Outflows

This study investigates the detectability of gamma rays and neutrinos from ultra-fast outflows (UFOs) emanating from active galactic nuclei (AGN). The researchers model particle acceleration at the strong shocks created by UFOs and estimate the associated gamma-ray and neutrino signals. Their findings suggest that several nearby identified UFOs could be detectable in the very-high-energy (VHE) domain by the Cherenkov Telescope Array Observatory (CTAO), even if they remain undetected by Fermi-LAT in the high-energy range. The detectability is favored for hard proton spectra, high acceleration efficiencies, and amplified magnetic fields. The results suggest that next-generation VHE observatories could detect the first gamma-ray signatures of AGN UFOs, providing a new probe of particle acceleration in sub-relativistic shocks. This research highlights the potential of multi-messenger astronomy to study extreme astrophysical phenomena. The detection of gamma rays from UFOs would provide valuable information about the energy output and feedback mechanisms of active galactic nuclei.

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