MG15 - Talk detail |
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Participant |
Shahamat Dehsorkh, Narjes | |||||||
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Institution |
Ferdowsi University of Mashahad - Vakilabad BV - Mashhad - Khorasan Razavi - Iran | |||||||
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Session |
AC3 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
The Effects of Vertical Self-gravity on Neutrino-dominated Accretion Disks: A Magnetized Case. | |||||
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Abstract |
In this work we consider the effects of vertical self-gravity on a magnetized neutrino-dominated accretion disk, which is supposed to be a candidate for central engine of gamma-ray bursts (GRBs). We study some of the physical timescales that are considered to play a crucial role in the disk's late-time activity, such as viscous, cooling, and diffusion timescales. We are also interested to probe the emission of X-ray flares' probability, observed in GRBs’ extended emission by an investigation on the “magnetic barrier” and “fragmentation”. Our results approve the self-gravity as an amplifier for Blandford–Payne luminosity (BP power) and the magnetic field produced through the accretion process, but a suppressor for neutrino luminosity and magnetic barrier. The latter takes place as a result of the fragmentation enhancement in the outer disk, which is more likely to happen for the higher mass accretion rates. |
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