论文标题
S-Star围绕SGR A*的PPN运动*
PPN motion of the S-stars around Sgr A*
论文作者
论文摘要
考虑到最接近银河中心紧凑型对象SGRA*的几个S-Star的运动后（PPN）运动方程。考虑到牛顿和牛顿后病例之间的轨道周期差异的影响。 S2的最佳拟合PN轨道的期限比牛顿长1天长16天。 PPN参数$β_\ text {ppn} $和$γ_\ text {ppn} $是测量的。贝叶斯采样用于符合PPN运动定律的轨迹。 $β_\ text {ppn} $和$γ_\ text {ppn} $的后验估计分别为$ 0.97^{+0.42} _ { - 0.65} $和$ 0.81^{+0.81^{+0.46} _ { - 0.60} $。该结果证实了在SGRA*附近轨道运动条件下，牛顿后运动方程的一般相对性预测。
Parametrized Post-Newtonian (PPN) equations of motion for several S-stars nearest to the Galactic Center compact relativistic object SgrA* are considered. The effect of the orbital periods difference between Newtonian and Post-Newtonian cases is taken into account. The best fit PN orbit of S2 has a period which is 16 days longer than Newtonian one. The PPN parameters $β_\text{PPN}$ and $γ_\text{PPN}$ are measured. Bayesian sampling is used to fit the trajectories of the PPN laws of motion. Posterior estimates of $β_\text{PPN}$ and $γ_\text{PPN}$ are $0.97^{+0.42}_{-0.65}$ and $0.81^{+0.46}_{-0.60}$ respectively. The result confirms General Relativity prediction for the Post-Newtonian equations of motion in the conditions of orbital motions in vicinity of the SgrA*.
