Differentially-rotating neutron star models with a parametrized rotation profile

Details Differentially-rotating neutron star models with a parametrized rotation profile Differentially-rotating neutron star models with a parametrized rotation profile

2011-01-13

arxiv.org/abs/1101.2664v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Submitted to A&A, 6 pages, 3 figures

Scientific paper

We analyze the impact of the choice rotation law on equilibrium sequences of relativistic differentially-rotating neutron stars in axisymmetry. The maximum allowed mass for each model is strongly affected by the distribution of angular velocity along the radial direction and by the consequent degree of differential rotation. In order to study the wide parameter space implied by the choice of rotation law, we introduce a functional form that generalizes the so called "j-const. law" adopted in all previous work. Using this new rotation law we reproduce the angular velocity profile of differentially-rotating remnants from the coalescence of binary neutron stars in various 3-dimensional dynamical simulations. We compute equilibrium sequences of differentially rotating stars with a polytropic equation of state starting from the spherically symmetric static case. By analyzing the sequences at constant ratio, T/|W|, of rotational kinetic energy to gravitational binding energy, we find that the parameters that best describe the binary neutron star remnants cannot produce equilibrium configurations with values of T/|W| that exceed 0.14, the criterion for the onset of the secular instability.

Affiliated with

Also associated with

No associations

Rating

Differentially-rotating neutron star models with a parametrized rotation profile 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 Differentially-rotating neutron star models with a parametrized rotation profile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differentially-rotating neutron star models with a parametrized rotation profile will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-78185