Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 891, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/ab7661
Keywords
Astrophysical black holes; Black hole physics; Black holes; Supermassive black holes; Neutrino astronomy; Active galactic nuclei; Seyfert galaxies; Particle astrophysics; High energy astrophysics; Accretion
Categories
Funding
- JSPS KAKENHI [JP16K13813, JP18H05458, JP19K14772, JP18H03722, JP24105007, JP16H02170]
- program of Leading Initiative for Excellent Young Researchers, MEXT, Japan
- RIKEN iTHEMS Program
Ask authors/readers for more resources
NGC 1068, a nearby type-2 Seyfert galaxy, is reported as the hottest neutrino spot in the 10 yr survey data of IceCube. Although there are several different possibilities for the generation of high-energy neutrinos in astrophysical sources, feasible scenarios allowing such emission in NGC 1068 have not yet been firmly defined. We show that the flux level of GeV and neutrino emission observed from NGC 1068 implies that the neutrino emission can be produced only in the vicinity of the supermassive black hole in the center of the galaxy. The coronal parameters, such as magnetic field strength and corona size, that make this emission possible, are consistent with the spectral excess registered in the millimeter range. The suggested model and relevant physical parameters are similar to those revealed for several nearby Seyferts. Due to the internal gamma-ray attenuation, the suggested scenario cannot be verified by observations of NGC 1068 in the GeV and TeV gamma-ray energy bands. However, the optical depth is expected to become negligible for MeV gamma-rays, thus future observations in this band will be able to validate our model.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available