Quasiequilibrium states of black hole-neutron star binaries in the moving-puncture framework

Details Quasiequilibrium states of black hole-neutron star binaries in the moving-puncture framework Quasiequilibrium states of black hole-neutron star binaries in the moving-puncture framework

2009-06-04

arxiv.org/abs/0906.0889v2

Phys.Rev.D79:124018,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, 5 figures; minor revision

Scientific paper

10.1103/PhysRevD.79.124018

General relativistic quasiequilibrium states of black hole-neutron star binaries are computed in the moving-puncture framework. We propose three conditions for determining the quasiequilibrium states and compare the numerical results with those obtained in the excision framework. We find that the results obtained in the moving-puncture framework agree with those in the excision framework and with those in the third post-Newtonian approximation for the cases that (i) the mass ratio of the binary is close to unity irrespective of the orbital separation, and (ii) the orbital separation is large enough ($m_0\Omega \alt 0.02$ where $m_0$ and $\Omega$ are the total mass and the orbital angular velocity, respectively) irrespective of the mass ratio. For $m_0 \Omega \agt 0.03$, both of the results in the moving-puncture and excision frameworks deviate, more or less, from those in the third post-Newtonian approximation. Thus the numerical results do not provide a quasicircular state, rather they seem to have a nonnegligible eccentricity of order 0.01--0.1. We show by numerical simulation that a method in the moving-puncture framework can provide approximately quasicircular states in which the eccentricity is by a factor of $\sim 2$ smaller than those in quasiequilibrium given by other approaches.

Affiliated with

Also associated with

No associations

Rating

Quasiequilibrium states of black hole-neutron star binaries in the moving-puncture framework 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 Quasiequilibrium states of black hole-neutron star binaries in the moving-puncture framework, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quasiequilibrium states of black hole-neutron star binaries in the moving-puncture framework will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-494582