Gamma-Ray Emission in the Seyfert Galaxy NGC 4151: Investigating the Role of Jet and Coronal Activities

Abstract

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 will allow one to distinguish between the two scenarios, as the coronal component can only contribute at energies of $\lesssim 1$ GeV. Our analysis also indicates that it might still be difficult to see coronal neutrinos from the apparently X-ray brightest Seyfert NGC 4151 with current-generation neutrino observatories.

7 pages, 4 figures, published in PASJ

References in corpus (20)

• Incremental Fermi Large Area Telescope Fourth Source Catalog
• Evidence for neutrino emission from the nearby active galaxy NGC 1068
• Time-integrated Neutrino Source Searches with 10 years of IceCube Data
• Kinematics of the Local Universe XIII. 21-cm line measurements of 452 galaxies with the Nançay radiotelescope, JHK Tully-Fisher relation and preliminary maps of the peculiar velocity field
• The $\gamma$-ray Emission of Star-Forming Galaxies
• Formation of Magnetically Truncated Accretion Disks in 3D Radiation-Transport Two-Temperature GRMHD Simulations
• A dust-parallax distance of 19 megaparsecs to the supermassive black hole in NGC 4151
• Long-term variability of the optical spectra of NGC 4151: I. Light curves and flux correlations
• A New Method for Measuring Extragalactic Distances
• The Cepheid Distance to the Seyfert 1 Galaxy NGC 4151
• Galactic outflow driven by the active nucleus and the origin of the gamma-ray emission in NGC 1068
• Radio jets in NGC 4151: where eMERLIN meets HST
• Unveiling the Nature of Coronae in Active Galactic Nuclei through Sub-mm Observations
• Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC~4151 During Outburst Stage: Evidence for Kinematics Evolution of Broad-line Region
• Gamma rays from Fast Black-Hole Winds
• New Insights in the Spectral Variability and Physical Conditions of the X-ray Absorbers in NGC 4151
• Nonthermal processes in hot accretion flows onto supermassive black holes: An inhomogeneous model
• Characterising the signatures of star-forming galaxies in the extra-galactic $\gamma$-ray background
• ALMA detection of parsec-scale blobs at the head of kiloparsec-scale jet in the nearby Seyfert galaxy NGC 1068
• The dust sublimation region of the Type 1 AGN NGC4151 at a hundred micro-arcsecond scale as resolved by the CHARA Array interferometer

Cited by in corpus (5)

• Sub-GeV Gamma Rays from Nearby Seyfert Galaxies and Implications for Coronal Neutrino Emission
• High-energy Emission from Turbulent Electron-ion Coronae of Accreting Black Holes
• On the possible contributions of two nearby blazars to the NGC 4151 neutrino hotspot
• The Disk Wind Contribution to the Gamma-Ray emission from the nearby Seyfert Galaxy GRS 1734-292
• Revisiting Disk Winds in Active Galactic Nuclei as an Origin of Cosmic Gamma-ray and Neutrino Backgrounds