A new three-dimensional general-relativistic hydrodynamics code

TL;DR

This paper introduces the Whisky code, a new 3D general relativistic hydrodynamics simulation tool designed for accurate long-term modeling of relativistic stars in curved spacetime.

Contribution

The paper presents a novel 3D code combining Einstein and hydrodynamics equations, enabling precise long-term simulations of relativistic star dynamics.

Findings

Successful long-term evolution of isolated relativistic stars

Accurate modeling of linear and nonlinear stellar dynamics

Integration of Einstein and hydrodynamics equations in a unified code

Abstract

We present a new three-dimensional general relativistic hydrodynamics code, the Whisky code. This code incorporates the expertise developed over the past years in the numerical solution of Einstein equations and of the hydrodynamics equations in a curved spacetime, and is the result of a collaboration of several European Institutes. We here discuss the ability of the code to carry out long-term accurate evolutions of the linear and nonlinear dynamics of isolated relativistic stars.