Self-gravity in Magnetized Neutrino-dominated Accretion Disks

@article{Shahamat2017SelfgravityIM,
  title={Self-gravity in Magnetized Neutrino-dominated Accretion Disks},
  author={Narjes Shahamat and Shahram Abbassi},
  journal={The Astrophysical Journal},
  year={2017},
  volume={845}
}
In the present work we study self-gravity effects on the vertical structure of a magnetized neutrino-dominated accretion disk as a central engine for gamma-ray bursts (GRBs). Some of the disk physical timescales that are supposed to play a pivotal role in the late-time evolutions of the disk, such as viscous, cooling, and diffusion timescales, have been studied. We are interested in investigating the possibility of the occurrence of X-ray flares, observed in late-time GRBs’ extended emission… 
1 Citations

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References

SHOWING 1-10 OF 77 REFERENCES

MAGNETICALLY TORQUED NEUTRINO-DOMINATED ACCRETION FLOWS FOR GAMMA-RAY BURSTS

Recent observations and theoretical work on gamma-ray bursts favor the central engine model of a Kerr black hole (BH) surrounded by a magnetized neutrino-dominated accretion flow (NDAF). The magnetic

SELF-GRAVITY IN NEUTRINO-DOMINATED ACCRETION DISKS

We present the effects of self-gravity on the vertical structure and neutrino luminosity of the neutrino-dominated accretion disks in cylindrical coordinates. It is found that significant changes of

The influence of magnetic fields on neutrino-dominated accretion disc

We consider the influence of magnetic fields on the model of neutrino-dominated accretion flows (NDAFs) for gamma-ray bursts (GRBs) via the assumption that the accretion rate of the disc is totally

Jet precession driven by neutrino-cooled disk for gamma-ray bursts

Aims. A model of jet precession driven by a neutrino-cooled disk around a spinning black hole is presented to explain the temporal structure and spectral evolution of gamma-ray bursts (GRBs).

PHASE TRANSITIONS AND He-SYNTHESIS-DRIVEN WINDS IN NEUTRINO COOLED ACCRETION DISKS: PROSPECTS FOR LATE FLARES IN SHORT GAMMA-RAY BURSTS

We consider the long-term evolution of debris following the tidal disruption of compact stars in the context of short gamma ray bursts. The initial encounter impulsively creates a hot, dense,

Neutrino-dominated Accretion and Supernovae

We suggest that part of the infalling material during the core collapse of a massive star goes into orbit around the compact core to form a hot, dense, centrifugally supported accretion disk whose

Structure and Luminosity of Neutrino-cooled Accretion Disks

Neutrino-cooled hyperaccretion disks around stellar-mass black holes are plausible candidates for the central engines of gamma-ray bursts. We calculate the one-dimensional structure and the

HYPER-ACCRETING BLACK HOLES AND GAMMA -

A variety of current models for gamma-ray bursts (GRBs) suggest a common engine-a black hole of several solar masses accreting matter from a disk at a rate 0.01 to 10 M s ?1. Using a numerical model

Magnetohydrodynamics of Neutrino-Cooled Accretion Tori around a Rotating Black Hole in General Relativity

We present our first numerical results of axisymmetric magnetohydrodynamic simula- tions for neutrino-cooled accretion tori around rotating black holes in general relativity. We consider tori of mass

Hyperaccreting Black Holes and Gamma-Ray Bursts

A variety of current models of gamma-ray bursts (GRBs) suggest a common engine: a black hole of several solar masses accreting matter from a disk at a rate of 0.01 to 10 M☉ s-1. Using a numerical
...