High-Order Numerical-Relativity Simulations of Binary Neutron Stars
- Others:
- Pogorelov, N. V.
- Audit, E.
- Zank, G. P.
Abstract
We report simulations of the inspiral and merger of binary neutron stars performed with WhiskyTHC, the first of a new generation of numerical relativity codes employing higher than second-order methods for both the spacetime and the hydrodynamic evolution. We find that the use of higher-order schemes improves substantially the quality of the gravitational waveforms extracted from the simulations when compared to those computed using traditional second-order schemes. The reduced de-phasing and the faster convergence rate allow us to estimate the phase evolution of the gravitational waves emitted, as well as the magnitude of finite-resolution effects, without the need of phase- or time-alignments or rescalings of the waves, as sometimes done in other works. Furthermore, by using an additional unpublished simulation at very high resolution, we confirm the robustness of our high convergence order of 3.2.
Additional Information
© 2015 Astronomical Society of the Pacific. We thank W. Kastaun for providing the primitive recovery routine and I. Hawke, S. Bernuzzi, D. Alic, R. Haas and K. Takami for useful discussions. Partial support comes from the Sherman Fairchild Foundation, the DFG grant SFB/Transregio 7, by "NewCompStar", COST Action MP1304, and by the Helmholtz International Center for FAIR. The calculations were performed on SuperMUC at the LRZ, on Datura at the AEI, and on LOEWE in Frankfurt.Attached Files
Published - 498-0121.pdf
Submitted - 1502.00551v1.pdf
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Additional details
- Eprint ID
- 62514
- Resolver ID
- CaltechAUTHORS:20151201-144111842
- Sherman Fairchild Foundation
- SFB/Transregio 7
- Deutsche Forschungsgemeinschaft (DFG)
- MP1304
- NewCompStar
- Helmholtz International Center for FAIR
- Created
-
2015-12-03Created from EPrint's datestamp field
- Updated
-
2023-06-02Created from EPrint's last_modified field
- Caltech groups
- TAPIR, Walter Burke Institute for Theoretical Physics
- Series Name
- Astronomical Society of the Pacific Conference Series
- Series Volume or Issue Number
- 498