http://arxiv.org/abs/2304.04138
NGC 4151, a nearby Seyfert galaxy, has recently been reported to emit gamma rays in the GeV range, posing an intriguing astrophysical mystery. The star formation rate of NGC 4151 is too low to explain the observed GeV flux, but the galaxy is known for its coronal activity in X-ray and jet activity in radio. We propose that either the combination of these two activities or the jet activity alone can account for the gamma-ray spectrum. An energy-dependent variability search would allow us to distinguish between the two scenarios, as the coronal component can only contribute at energies of $\lesssim1$ GeV. Our analysis also indicates that the expected neutrino flux from the coronal component is likely to be undetectable by IceCube.
Y. Inoue and D. Khangulyan
Tue, 11 Apr 23
39/63
Comments: 6 pages, 3 figures