Magnetorotational Collapse of Population III Stars

Details Magnetorotational Collapse of Population III Stars Magnetorotational Collapse of Population III Stars

2007-04-16

arxiv.org/abs/0704.1945v1

Publ.Astron.Soc.Jap.59:771-785,2007

Astronomy and Astrophysics

Astrophysics

24 pages, 17 figures. Accepted for publication in PASJ. A paper with high-resolution figures available at "http://www-utap.p

Scientific paper

We perform a series of two-dimensional magnetorotational core-collapse simulations of Pop III stars. Changing the initial distributions of rotation and magnetic fields prior to collapse in a parametric manner, we compute 19 models. By so doing, we systematically investigate how rotation and magnetic fields affect the collapse dynamics and explore how the properties of the black-hole formations and neutrino emissions could be affected. As for the microphysics, we employ a realistic equation of state and approximate the neutrino transfer by a multiflavour leakage scheme. With these computations, we find that the jet-like explosions are obtained by the magnetodriven shock waves if the initial magnetic field is as large as $10^{12}$ G. We point out that the black-hole masses at the formation decrease with the initial field strength, on the other hand, increase with the initial rotation rates. As for the neutrino properties, we point out that the degree of the differential rotation plays an important role to determine which species of the neutrino luminosity is more dominant than the others. Furthermore, we find that the stronger magnetic fields make the peak neutrino luminosities smaller, because the magnetic pressure acts to halt the collapse in the central regions, leading to the suppression of the releasable gravitational binding energies.

Affiliated with

Also associated with

No associations

Rating

Magnetorotational Collapse of Population III Stars 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 Magnetorotational Collapse of Population III Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetorotational Collapse of Population III Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-44105