High-order fully general-relativistic hydrodynamics: new approaches and tests
By David Radice, Luciano Rezzolla, F. Galeazzi. 2013
138 citations recorded by the source corpus.
We present a new approach for achieving high-order convergence in fully general-relativistic hydrodynamic simulations. The approach is implemented in WhiskyTHC, a new code that makes use of state-of-the-art numerical schemes and was key in achieving, for the first time, higher than second-order convergence in the calculation of the gravitational radiation from inspiraling binary neutron stars (Radice et al 2014 Mon. Not. R. Astron. Soc. 437 L46–L50). Here, we give a detailed description of the algorithms employed and present results obtained for a series of classical tests involving isolated neutron stars. In addition, using the gravitational-wave emission from the late-inspiral and merger of binary neutron stars, we make a detailed comparison between the results obtained with the new code and those obtained when using standard second-order schemes commonly employed for matter simulations in numerical relativity. We find that even at moderate resolutions and for binaries with large compactness, the phase accuracy is improved by a factor 50 or more.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/90d4b81d136f3baaf026b7c1914b7d2352c19b1b
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In Astronomy and Astrophysics
- David Radice
- Albino Perego
- Sebastiano Bernuzzi
- B. Metzger
- Luke F. Roberts
- Jonas Lippuner
- Christian D. Ott
- K. Hotokezaka
Citations in the corpus
- Dynamical Mass Ejection from Binary Neutron Star Mergers (2016, methodology): “In all simulations we employ the positivity preserving limiter presented in Radice et al. (2014a), which minimizes errors related to the numerical density floor.”
- Binary Neutron Star Mergers: Mass Ejection, Electromagnetic Counterparts, and Nucleosynthesis (2018, methodology): “We evolve the initial data using the WhiskyTHC code (Radice & Rezzolla 2012; Radice et al. 2014a, 2014b, 2015).”
- The black hole accretion code (2016, methodology): “and was successfully applied in GRHD simulations by [113].”
- GW170817: Joint Constraint on the Neutron Star Equation of State from Multimessenger Observations (2017, methodology): “We perform 29 merger simulations using the GR hydrodynamics code WhiskyTHC (Radice & Rezzolla 2012; Radice et al. 2014a, 2014b).”