We aim to improve the accuracy of radiative energy transport in three-dimensional radiation hydrodynamical simulations in ANTARES (A Numerical Tool for Astrophysical RESearch). We implement in the ANTARES short-characteristics numerical schemes a modification of the Bézier interpolant solver. This method yields a smoother surface structure in simulations of solar convection and reduces the artifacts appearing due to the limited number of rays along which the integration is done. Reducing such artifacts leads to increased stability of the code. We show that our new implementation achieves a better agreement of the temperature structure and its gradient with a semi-empirical model derived from observations, as well as of synthetic spectral-line profiles with the observed solar spectrum.

我们的目标是在ANTARES（天体物理研究的数值工具）的三维辐射流体动力学模拟中提高辐射能传输的准确性。我们在ANTARES短特征数值方案中实现了对Bézier插值求解器的修改。在太阳对流的模拟中，此方法可产生更平滑的表面结构，并减少了由于进行积分所受的光线数量有限而导致出现的伪影。减少此类伪像可提高代码的稳定性。我们表明，我们的新实施方案使用从观测得出的半经验模型以及与观测到的太阳光谱合成的光谱线剖面图，实现了温度结构及其梯度的更好一致性。