2025/01/13 by Kumar, Amit, Chakrabarti, Sayan, Das, Santabrata · 1 citation
#FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE)
paper · doi:10.48550/arxiv.2501.07080
We investigate the relativistic, viscous, advective, neutrino-dominated accretion flows (NDAFs) around rotating stellar mass black holes, incorporating neutrino cooling. By adopting an effective potential to describe the spacetime geometry around the rotating black holes, we self-consistently solve the governing NDAF equations to obtain global transonic accretion solutions. Our findings indicate that, depending on the model parameters, namely energy (ε), angular momentum (λ), accretion rate (m), viscosity (α) and black hole spin (a\rm k), NDAFs may harbor standing shocks where the Rankine-Hugoniot shock conditions (RHCs) are satisfied. Utilizing these shock-induced NDAF solutions, we compute the neutrino luminosity (Lν) and neutrino annihilation luminosity (Lνν) across a wide range of model parameters. We further calculate maximum neutrino luminosity (Lν\rm max) and neutrino annihilation luminosity (Lνν\rm max) resulting in Lν\rm max ∼ 1051-53 erg s-1 (1048-51 erg s-1) and Lνν\rm max ∼ 1048-52 erg s-1 (1042-49 erg s-1) for a\rm k=0.99 (0.0). These findings suggest that shocked NDAF solutions are potentially promising to explain the energy output of gamma-ray bursts (GRBs). We employ our NDAF model formalism to elucidate L\rm obsνν for five GRBs with known redshifts and estimate their accretion rate ( m) based on the spin (a\rm k) of the central source of GRBs under consideration.