Dead zone formation and non-steady hyperaccretion in collapsar disks

Details Dead zone formation and non-steady hyperaccretion in collapsar disks Dead zone formation and non-steady hyperaccretion in collapsar disks

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..259..119m&link_type=abstract

Cosmic Magnetic Fields: From Planets, to Stars and Galaxies, Proceedings of the International Astronomical Union, IAU Symposium,

Astronomy and Astrophysics

Astronomy

Gamma-Rays: Bursts, Accretion Disks, Mhd

Scientific paper

In ultra dense and hot region realized in stellar core-collapse, neutrino takes major role in energy and momentum transports. We investigate the growth of magnetorotational instability (MRI) in neutrino viscous matter by using linear theory. It is found from the local linear analysis that the neutrino viscosity can suppress the MRI in the regime of weak magnetic field (B ≪ 1014G). This suggest that MHD turbulence sustained by the MRI might not be driven efficiently in the neutrino viscous media. Applying this result to collapsar disk, which is known as the central engine of gamma-ray burst (GRB), we find that the MRI can be suppressed only in its inner region. Based on this finding, a new evolutionary scenario of collapsar disk, “Episodic Disk Accretion Model” are proposed.

Affiliated with

Also associated with

No associations

Rating

Dead zone formation and non-steady hyperaccretion in collapsar disks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dead zone formation and non-steady hyperaccretion in collapsar disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dead zone formation and non-steady hyperaccretion in collapsar disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1522325