Astrophysical Journal, ( ISI ), Volume (845), No (1), Year (2017-8) , Pages (64-75)

Title : ( Self-gravity in Magnetized Neutrino-dominated Accretion Disks )

Authors: narjes shahamat dehsorkh , Shahram Abbassi ,

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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 through the “magnetic barrier” and “fragmentation” processes in our model. The results lead us to interpret self-gravity as an amplifier for Blandford–Payne luminosity (BP power) and the generated magnetic field, but a suppressor for neutrino luminosity and magnetic barrier processes via highlighting the fragmentation mechanism in the outer disk, especially for the higher mass accretion rates.


, Key words: accretion, accretion disks – magnetic fields – magnetohydrodynamics (MHD)
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author = {Shahamat Dehsorkh, Narjes and Abbassi, Shahram},
title = {Self-gravity in Magnetized Neutrino-dominated Accretion Disks},
journal = {Astrophysical Journal},
year = {2017},
volume = {845},
number = {1},
month = {August},
issn = {0004-637X},
pages = {64--75},
numpages = {11},
keywords = {Key words: accretion; accretion disks – magnetic fields – magnetohydrodynamics (MHD)},


%0 Journal Article
%T Self-gravity in Magnetized Neutrino-dominated Accretion Disks
%A Shahamat Dehsorkh, Narjes
%A Abbassi, Shahram
%J Astrophysical Journal
%@ 0004-637X
%D 2017