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arXiv 2302.10482gr-qchep-th
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利用银心恒星对圈量子引力中施瓦西时空量子扩展的观测检验

Observational tests of quantum extension of Schwarzschild spacetime in loop quantum gravity with stars in the galactic center

Jian-Ming Yan, Cheng Liu, Tao Zhu, Qiang Wu, Anzhong Wang

AI总结:

本研究利用银心17颗绕Sgr A*运行恒星的观测数据,通过测地线演化转化与MCMC模拟检验圈量子引力的施瓦西时空量子扩展模型,未发现相关显著证据,并由S2星给出LQG参数95%置信度的最强上限约束。

摘要:

本文利用围绕人马座A*(Sgr A*)运行的17颗恒星的公开观测数据,检验圈量子引力(loop quantum gravity, LQG)框架下施瓦西时空的量子扩展模型。为此,我们将有质量粒子在量子扩展施瓦西黑洞中的测地线演化转化为受摄开普勒问题,计算LQG效应对恒星近心点进动的影响。基于这些效应,可将其与银心恒星的公开天体测量和光谱观测数据进行对比。我们开展了马尔可夫链蒙特卡洛(Monte Carlo Markov Chain, MCMC)模拟,以探究LQG对S型恒星轨道的可能影响。研究未发现支持LQG量子扩展施瓦西黑洞的显著证据。在17颗S型恒星的后验分析中,S2星的结果对LQG参数$A_λ$给出了最强约束,在95%置信水平下$A_λ$的上限为$A_λ< 0.302$。

英文摘要:

In this paper, we use the publicly available observational data of 17 stellar stars orbiting Sgr A* to test the quantum extension of Schwarzschild spacetime in loop quantum gravity (LQG). For our purpose, we transform the geodesical evolution of a massive particle in the quantum-extended Schwarzschild black hole to the perturbed Kepler problem and calculate the effects of LQG on the pericentre advance of the stellar stars. With these effects, one is able to compare them with the publicly available astrometric and spectroscopic data of stellar stars in the galactic center. We perform Monte Carlo Markov Chain (MCMC) simulations to probe the possible LQG effects on the orbit of S-stars. No significant evidence of the quantum-extended Schwarzschild black hole from LQG is found. Among the posterior analyses of 17 S-stars, the result of S2 gives the strongest bound on the LQG parameter $A_λ$, which places an upper bound at 95\% confidence level on $A_λ$ to be $A_λ< 0.302$.

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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