文献类型：期刊文献

英文题名：The accretion disk and neutrino propagation of Barrow-modified Black Hole

作者：Shi, Yuxuan[1]; Cheng, Hongbo[1,2]

机构：[1] Department of Physics, East China University of Science and Technology, Shanghai, 200237, China; [2] The Shanghai Key Laboratory of Astrophysics, Shanghai, 200234, China

年份：2025

外文期刊名：arXiv

收录：EI(收录号：20250184059)

语种：英文

外文关键词：Astrophysics - Atomic physics - Black holes - Fractals - Gravitation - Neutrons - Quantum theory

摘要：This paper attempts to clarify the deep consequences of Barrow fractal black hole spacetime configurations caused by quantum gravity on neutrino pair annihilation and accretion disk dynamics. We systematically derive the analytical expression for the innermost stable circular orbit (ISCO) radius (rISCO ∝ M2/(2+?)) by building a Barrow-modified static spherically symmetric metric (r → r1+?/2), and we find that increasing ? significantly shifts the ISCO inward. We numerically solve the radiation flux, effective temperature, and differential luminosity distribution under the modified metric based on the Novikov-Thorne relativistic thin accretion disk model. For ? = 1, the results show that the temperature increases by 62.5%, the peak disk radiation flux increases by 22.5%, and the spectral radiance increases by around 50%. Fractal horizons enhance neutrino trajectory bending effects, according to further study of neutrino pair annihilation (ννˉ → e+e?) energy deposition processes using local Lorentz transformations and null geodesic equations. The energy deposition rate for ? = 1 is 8?28 times higher than classical estimates when the black hole radius is R/M ～ 3 ? 4. This work provides important theoretical insights into the influence of quantum spacetime geometry on high-energy astrophysical phenomena in extreme gravitational fields by establishing, for the first time, quantitative relationships between the Barrow parameter ? and neutrino pair annihilation energy and accretion disk radiative efficiency. ? 2025, CC BY.