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arXiv 2409.10567astro-ph.GA
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S2星动力学探测银河系核心星团

S2-star dynamics probing the Galaxy core cluster

N. Galikyan, Sh. Khlghatyan, A. A. Kocharyan, V. G. Gurzadyan

AI总结:

本研究利用S2星数据,通过PINN分析的进动值结合Holtsmark分布的随机力模型,得到银河系核心星团恒星密度临界值,为研究银心星团结构提供约束。

摘要:

本研究利用S2星的观测数据,对银河系中心超大质量黑洞周围的星团展开探测。研究采用物理信息神经网络(PINN)分析S2星数据得到的进动值,探究S2星与星团内恒星的散射作用——该作用由遵循Holtsmark分布的随机力描述。研究得到核心星团恒星密度的临界值约为n_crit ≈ 8.3×10^6 pc^-3:当密度处于该临界值时,PINN观测到的进动值落在散射导致的进动中位数周围70%置信区间(15%至85%分位数之间)内;这意味着在更高的恒星密度下,S2星的轨道扰动会超过观测值。

英文摘要:

The star cluster surrounding the supermassive black hole in the center of Milky Way is probed using the data on the S2 star. The value of precession found at the physics-informed neural networks (PINN) analysis of the S2 data is used to consider the role of the scattering of S2 star on stars of the cluster, described by a random force given by the Holtsmark distribution. The critical value for the star density of the core cluster for which the observed precession value by PINN lies inside 70% confidence interval (between 15% and 85% quantiles) around the median of precession due to scattering, is obtained as n_crit \approx 8.3 10^6 pc^-3, that is at higher star densities the perturbation of the orbit of S2 would exceed the observed one.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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