2024/07/30 by Chitipat Deesamer, Deesamer, Chitipat, P Chainakun +3
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE)
paper · pdf · doi:10.48550/arxiv.2407.20507
openalex publication_date 2024/07/30 · openalex created_date 2024/08/01 · openalex updated_date 2026/07/28
The stellar-mass black hole surrounded by the neutrino-dominated accretion flow (NDAF) is proposed to be the central engine of the gamma-ray burst (GRB). In this work, we investigate the neutrino/anti-neutrino luminosity and annihilation luminosity from the NDAF and pair-annihilation model, taking into account the neutrino oscillation above the accretion disk. The disk hydrodynamical properties are modelled using the empirical solution previously derived with boundary conditions including the effect of electron degeneracy and neutrino trapping. Our key parameters are the mass accretion rate and the black hole spin given in the range of M = 0.1 - 10 M_\odot s-1 and 0 ≤ a < 1, respectively. Without neutrino oscillation, the obtained neutrino/anti-neutrino luminosity is ∼ 1051 - 1053 \textrmerg s-1, while the neutrino annihilation luminosity is found to be ∼ 1046 - 1051 \textrmerg s-1. In the presence of neutrino oscillation in the vacuum limit, the electron neutrino annihilation luminosity decreases by \lesssim 22% through the flavor transformation, while the muon- and tau-neutrino luminosity can increase up to ∼ 45% and 60%, respectively. As a result, the total annihilation luminosity can be reduced up to ∼ 19% due to the oscillation process above the disk. Finally, we also investigate the case whereby the CP-violating phase is changed from δ\textrmCP = 0∘ to 245∘. However, our results reveal that the CP-violating phase has minimal impact on neutrino annihilation luminosity.