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arXiv 2108.06286astro-ph.COastro-ph.SRgr-qchep-ph
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银河系中心附近的暗能量相互作用

Dark energy interactions near the galactic centre

David Benisty, Anne-Christine Davis

摘要:

我们调查标量张量理论,暗能量模型的动机,在我们的银河系中心的黑洞周围的强引力制度。在这样的理论中,广义相对论被修正,因为标量场与物质耦合。我们考虑标量场与物质的最一般的共形耦合和非形式耦合,来研究银河系恒星中心$Sgr A^{*}$附近恒星的轨道行为。马尔可夫链蒙特卡罗(MCMC)模拟给出了标量场与物质耦合参数的界。使用贝叶斯分析产生的第一个约束,这种理论在强引力制度。

英文摘要:

We investigate scalar-tensor theories, motivated by dark energy models, in the strong gravity regime around the black hole at the centre of our galaxy. In such theories general relativity is modified since the scalar field couples to matter. We consider the most general conformal and disformal couplings of the scalar field to matter to study the orbital behavior of the nearby stars around the galactic star center $Sgr A^{*}$. Markov Chain Monte Carlo (MCMC) simulation yields a bound on the parameters of the couplings of the scalar field to matter. Using Bayesian Analysis yields the first constraints on such theories in the strong gravity regime.

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