High-energy Electromagnetic, Neutrino, and Cosmic-Ray Emission by Stellar-mass Black Holes in Disks of Active Galactic Nuclei

被引：14
作者：
Tagawa, Hiromichi [1 ,2 ,3 ]
Kimura, Shigeo S. [2 ,4 ]
Haiman, Zoltan [1 ]
机构：
[1] Columbia Univ, Dept Astron, 550 W 120th St, New York, NY 10027 USA
[2] Tohoku Univ, Astron Inst, Grad Sch Sci, Aoba, Sendai 9808578, Japan
[3] Natl Astron Observ Japan, Natl Inst Nat Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
[4] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Sendai 9808578, Japan
来源：
ASTROPHYSICAL JOURNAL | 2023年 / 955卷 / 01期
基金：
日本学术振兴会;
关键词：
RELATIVISTIC COLLISIONLESS SHOCKS; ADVECTION-DOMINATED ACCRETION; MAGNETICALLY ARRESTED DISKS; LARGE-AREA TELESCOPE; MEV GAMMA-RAY; NGC; 1068; X-RAY; FERMI-LAT; OBSERVABLE SIGNATURES; MOLECULAR TORUS;
D O I：
10.3847/1538-4357/ace71d
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Some Seyfert galaxies are detected in high-energy gamma rays, but the mechanism and site of gamma-ray emission are unknown. Also, the origins of the cosmic high-energy neutrino and MeV gamma-ray backgrounds have been veiled in mystery since their discoveries. We propose emission from stellar-mass BHs (sBHs) embedded in disks of active galactic nuclei as their possible sources. These sBHs are predicted to launch jets due to the Blandford-Znajek mechanism, which can produce intense electromagnetic, neutrino, and cosmic-ray emissions. We investigate whether these emissions can be the sources of cosmic high-energy particles. We find that emission from internal shocks in the jets can explain gamma rays from nearby radio-quiet Seyfert galaxies including NGC 1068, if the Lorentz factor of the jets (Gamma(j)) is high. On the other hand, for moderate Gamma(j), the emission can significantly contribute to the background gamma-ray and neutrino intensities in the similar to MeV and less than or similar to PeV bands, respectively. Furthermore, for moderate Gamma(j) with efficient amplification of the magnetic field and cosmic-ray acceleration, the neutrino emission from NGC 1068 and the ultrahigh-energy cosmic rays can be explained. These results suggest that the neutrino flux from NGC 1068 as well as the background intensities of MeV gamma rays, neutrinos, and the ultrahigh-energy cosmic rays can be explained by a unified model. Future MeV gamma-ray satellites will test our scenario for neutrino emission.
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页数：14
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