暗物质缺乏星系 NGC 1052-DF4 的球状星团群的旋转：对总质量的影响

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-05-16 DOI:10.1017/pasa.2024.42

Yuan Li, B. Brewer, G. F. Lewis

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引用次数: 0

摘要

我们利用贝叶斯推理方法探索了暗物质缺乏星系NGC 1052-DF4的球状星团群，以寻找旋转的存在。这种旋转成分的存在关系到星系质量的估计，因此也关系到NGC 1052-DF4是否真的缺乏暗物质的问题，它与同组的另一个星系NGC 1052-DF2类似。我们研究了NGC 1052-DF4中七个球状星团的旋转特征，发现非旋转运动学模型的贝叶斯证据比旋转模型高出约2.5倍。此外，我们还发现，在旋转的假设下，其振幅一定很小。这种明显缺乏旋转的现象进一步证明，根据其内在速度色散，NGC 1052-DF4 是一个真正缺乏暗物质的星系。

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Rotation of the Globular Cluster Population of the Dark Matter Deficient Galaxy NGC 1052-DF4: Implication for the total mass

We explore the globular cluster population of NGC 1052-DF4, a dark matter deficient galaxy, using Bayesian inference to search for the presence of rotation. The existence of such a rotating component is relevant to the estimation of the mass of the galaxy, and therefore the question of whether NGC 1052-DF4 is truly deficient of dark matter,similar to NGC 1052-DF2, another galaxy in the same group. The rotational characteristics of seven globular clusters in NGC 1052-DF4 were investigated, finding that a non-rotating kinematic model has a higher Bayesian evidence than a rotating model, by a factor of approximately 2.5. In addition, we find that under the assumption of rotation, its amplitude must be small. This distinct lack of rotation strengthens the case that, based on its intrinsic velocity dispersion, NGC 1052-DF4 is a truly dark matter deficient galaxy.

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.