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arXiv 2105.03357astro-ph.GA
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混合引力对椭圆星系中恒星运动学的可能影响

Possible effects of Hybrid Gravity on stellar kinematics in elliptical galaxies

V. Borka Jovanović, D. Borka, P. Jovanović, S. Capozziello

摘要:

我们使用基本平面的椭圆Galerkin来约束所谓的混合重力,一个修改后的引力理论,广义相对论是改进的进一步自由度的度量仿射Palatini形式主义的$f(\cal R)$重力。由于基本面与椭圆星系的整体性质有关,因此在弱场极限下可以获得对混合引力参数的观测约束。我们还分析了椭圆星系的速度分布比较我们的理论结果的情况下,混合引力与天文数据的椭圆星系。通过这种方式,我们能够约束混合重力参数$m_ϕ$和$ϕ_0$。我们表明,基本平面,即$v_c/σ$关系,可以作为一个标准的工具来探测不同的引力理论在弱场极限。我们的结论是,混合引力是能够解释椭圆星系与不同的恒星运动学没有暗物质假设。

英文摘要:

We use the Fundamental Plane of Elliptical Galaxies to constrain the so-called Hybrid Gravity, a modified theory of gravity where General Relativity is improved by further degrees of freedom of metric-affine Palatini formalism of $f(\cal R)$ gravity. Because the Fundamental Plane is connected to the global properties of elliptical galaxies, it is possible to obtain observational constraints on the parameters of Hybrid Gravity in the weak field limit. We analyze also the velocity distribution of elliptical galaxies comparing our theoretical results in the case of Hybrid Gravity with astronomical data for elliptical galaxies. In this way, we are able to constrain the Hybrid Gravity parameters $m_ϕ$ and $ϕ_0$. We show that the Fundamental Plane, i.e. $v_c/σ$ relations, can be used as a standard tool to probe different theories of gravity in the weak field limit. We conclude that Hybrid Gravity is able to explain elliptical galaxies with different stellar kinematics without the dark matter hypothesis.

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