Axisymmetric simulations of magneto--rotational core collapse: dynamics and gravitational wave signal

Details Axisymmetric simulations of magneto--rotational core collapse: dynamics and gravitational wave signal Axisymmetric simulations of magneto--rotational core collapse: dynamics and gravitational wave signal

2005-10-06

arxiv.org/abs/astro-ph/0510184v2

Astron.Astrophys.450:1107-1134,2006

Astronomy and Astrophysics

Astrophysics

34 pages, 25 figures, accepted for publication in A&A. Minor changes in the main text, additional appendix on numerical conver

Scientific paper

10.1051/0004-6361:20054306

We have performed a comprehensive parameter study of the collapse of rotating, strongly magnetized stellar cores in axisymmetry to determine their gravitational wave signature based on the Einstein quadrupole formula. We use a Newtonian explicit magnetohydrodynamic Eulerian code based on the relaxing-TVD method for the solution of the ideal MHD equations, and apply the constraint-transport method to guarantee a divergence--free evolution of the magnetic field. We neglect effects due to neutrino transport and employ a simplified equation of state. The pre--collapse initial models are polytropes in rotational equilibrium with a prescribed degree of differential rotation and rotational energy (~ 1 % of the gravitational energy). The initial magnetic fields are purely poloidal the field strength ranging from 10^10 G to 10^13 G. The evolution of the core, whose collapse is initiated by reducing the gas pressure by a prescribed amount, is followed until a few ten milliseconds past core bounce. The initial magnetic fields are amplified mainly by the differential rotation of the core giving rise to a strong toroidal field component. The poloidal field component grows by compression during collapse, but does not change significantly after core bounce if (abbreviated)

Affiliated with

Also associated with

No associations

Rating

Axisymmetric simulations of magneto--rotational core collapse: dynamics and gravitational wave signal 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 Axisymmetric simulations of magneto--rotational core collapse: dynamics and gravitational wave signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Axisymmetric simulations of magneto--rotational core collapse: dynamics and gravitational wave signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-323670