As we approach the era of gravitational-wave astrophysics driven by observations, it is imperative to have general-relativistic hydrodynamic codes capable of revealing in exquisite detail phenomena driven by strong dynamical gravity.
In this paper, Radice, Rezzolla and Galeazzi introduce a new approach to build a code, called WhiskyTHC, with the potential to help deliver that. The new approach borrows elements from the Whisky and Template Hydrodynamics codes. The Whisky code is widely used by the numerical relativity community, and the Template Hydrodynamics code provides its high-order, high-resolution shock-capturing properties to the new code.
The paper is nicely written. What I find particularly valuable is the level of details given about the new algorithms for others to implement them. A comprehensive series of test provide convincing evidence of WhiskyTHC’s potential, highlighting the importance of using higher than second-order algorithms in general-relativistic hydrodynamic simulations of neutron stars.
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