论文标题
关于三轴Schwarzschild建模的鲁棒性：校正轨道镜像的效果
On the robustness of triaxial Schwarzschild modelling: The effects of correcting the orbit mirroring
论文作者
论文摘要
在过去的15年中，van den Bosch等人的三轴Schwarzschild轨道式代码。 （2008）已广泛应用于研究星系的动力学。最近，Quenneville等。 （2022）在此代码的轨道计算中报告了一个错误，特别是在用于加快计算加速的镜像过程中。我们已经修复了炸药中的不正确镜像，炸药是van den Bosch等人的三轴Schwarzschild代码的公开继承者。 （2008）。在这项研究中，我们对此错误如何影响使用此代码执行的动态分析结果进行了详尽的量化。我们比较了炸药的原始和校正版本获得的结果，并讨论了单个轨道和全球恒星轨道分布的相位空间分布的差异，在高度三轴星系PGC 46832中的中央黑洞的质量估算中，以及在内在形状和封闭质量的测量中，以超过50个星系的测量。专注于Schwarzschild三轴代码的典型科学应用，在我们的所有测试中，我们发现在统计和系统的不确定性方面差异可以忽略不计。我们得出的结论是，Van den Bosch等人先前的结果。 （2008）三轴施瓦茨柴尔德代码不受不正确的镜像的显着影响。
In the past 15 years, the triaxial Schwarzschild orbit-superposition code by van den Bosch et al. (2008) has been widely applied to study the dynamics of galaxies. Recently, Quenneville et al. (2022) reported a bug in the orbit calculation of this code, specifically in the mirroring procedure that is used to speed up the computation. We have fixed the incorrect mirroring in DYNAMITE, which is the publicly-released successor of the triaxial Schwarzschild code by van den Bosch et al. (2008). In this study, we provide a thorough quantification of how this bug has affected the results of dynamical analyses performed with this code. We compare results obtained with the original and corrected versions of DYNAMITE, and discuss the differences in the phase-space distribution of a single orbit and in the global stellar orbit distribution, in the mass estimate of the central black hole in the highly triaxial galaxy PGC 46832, and in the measurement of intrinsic shape and enclosed mass for more than 50 galaxies. Focusing on the typical scientific applications of a Schwarzschild triaxial code, in all our tests we find that differences are negligible with respect to the statistical and systematic uncertainties. We conclude that previous results with the van den Bosch et al. (2008) triaxial Schwarzschild code are not significantly affected by the incorrect mirroring.
