IceCube Search for Neutrino Emission from X-Ray Bright Seyfert Galaxies
Journal Article
·
· The Astrophysical Journal
The recent IceCube detection of TeV neutrino emission from the nearby active galaxy NGC 1068 suggests that active galactic nuclei (AGNs) could make a sizable contribution to the diffuse flux of astrophysical neutrinos. The absence of TeV γ-rays from NGC 1068 indicates neutrino production in the vicinity of the supermassive black hole, where the high radiation density leads to γ-ray attenuation. Therefore, any potential neutrino emission from similar sources is not expected to correlate with high-energy γ-rays. Disk-corona models predict neutrino emission from Seyfert galaxies to correlate with keV X-rays because they are tracers of coronal activity. Using through-going track events from the Northern Sky recorded by IceCube between 2011 and 2021, we report results from a search for individual and aggregated neutrino signals from 27 additional Seyfert galaxies that are contained in the Swift's Burst Alert Telescope AGN Spectroscopic Survey. Besides the generic single power law, we evaluate the spectra predicted by the disk-corona model assuming stochastic acceleration parameters that match the measured flux from NGC 1068. Assuming all sources to be intrinsically similar to NGC 1068, our findings constrain the collective neutrino emission from X-ray bright Seyfert galaxies in the northern sky, but, at the same time, show excesses of neutrinos that could be associated with the objects NGC 4151 and CGCG 420-015. These excesses result in a 2.7σ significance with respect to background expectations.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 3007106
- Journal Information:
- The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 988; ISSN 0004-637X; ISSN 1538-4357
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for Neutrino Emission from Hard X-Ray AGN with IceCube
On the Neutrino and Gamma-Ray Emission from NGC 1068
Neutrino and gamma-ray emissions from NGC 1068
Conference
·
Sun Mar 09 20:00:00 EDT 2025
·
OSTI ID:2572238
On the Neutrino and Gamma-Ray Emission from NGC 1068
Journal Article
·
Thu Jul 06 00:00:00 EDT 2023
· TBD
·
OSTI ID:2202844
Neutrino and gamma-ray emissions from NGC 1068
Journal Article
·
Thu Dec 04 19:00:00 EST 2025
· Physical Review. D.
·
OSTI ID:2202938