Vertical Structure of Neutrino-Dominated Accretion Disk and Applications to Gamma-Ray Bursts

TL;DR

This paper investigates the vertical structure of neutrino-dominated accretion disks, revealing their thick geometry under advection dominance and showing enhanced neutrino annihilation luminosity, which explains jet formation in gamma-ray bursts.

Contribution

It provides a revised model of the disk's vertical structure and quantifies neutrino annihilation luminosity, improving understanding of gamma-ray burst central engines.

Findings

Neutrino-dominated disks are geometrically thick when advection dominates.

Neutrino annihilation luminosity is increased by one or two orders of magnitude.

An empty funnel along the rotation axis explains neutrino-driven ejections.

Abstract

We revisit the vertical structure of neutrino-dominated accretion flows in spherical coordinates. We stress that the flow should be geometrically thick when advection becomes dominant. In our calculation, the luminosity of neutrino annihilation is enhanced by one or two orders of magnitude. The empty funnel along the rotation axis can naturally explain the neutrino annihilable ejection.