Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-03-31
Phys.Rev. D63 (2001) 024012
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
18 pages, RevTex, 11 figures
Scientific paper
10.1103/PhysRevD.63.024012
An implicit, fully characteristic, numerical scheme for solving the field equations of a cosmic string coupled to gravity is described. The inclusion of null infinity as part of the numerical grid allows us to apply suitable boundary conditions on the metric and matter fields to suppress unphysical divergent solutions. The code is tested by comparing the results with exact solutions, checking that static cosmic string initial data remain constant when evolved and undertaking a time dependent convergence analysis of the code. It is shown that the code is accurate, stable and exhibits clear second order convergence. The code is used to analyse the interaction between a Weber--Wheeler pulse of gravitational radiation with the string. The interaction causes the string to oscillate at frequencies inversely proportional to the masses of the scalar and vector fields of the string. After the pulse has largely radiated away the string continues to ring but the oscillations slowly decay and eventually the variables return to their static values.
Sjodin K. R. P.
Sperhake Uli
Vickers James A.
No associations
LandOfFree
Dynamic Cosmic Strings II: Numerical evolution of excited Cosmic Strings 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 Dynamic Cosmic Strings II: Numerical evolution of excited Cosmic Strings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic Cosmic Strings II: Numerical evolution of excited Cosmic Strings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-291192