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arXiv 2111.01700astro-ph.GA
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MOND临界加速度标度的起源

The origin of the MOND critical acceleration scale

David Roscoe

摘要:

MOND无可辩驳的成功是建立在一个临界引力加速度标度$a_0$存在的基础上的。但是,除了它在MOND中的作用之外,还有一个问题:“为什么临界引力加速度标度会存在?”“仍然没有答案关于这一点,人们并没有深入的理解,在MOND成为争议话题的大致同一时期,巴利舍夫、西洛斯·拉比尼、彼得罗内罗和其他人一直在争论,至少在中等尺度上,宇宙中的物质是以准分形$D\approx 2$的方式分布的,早些年也有同样的争议。有一个链接:如果一个中等尺度的准分形$D \approx 2$宇宙的想法被认真对待,那么就有一个相关的特征质量表面密度尺度,比如说$Σ_F$,和一个相关的特征引力加速度尺度,$a_F = 4 πG Σ_F$。此外,如果准分形结构被认为包括星系际介质,那么考虑$a_0$和$a_F$是同一事物的可能性是一个明显的步骤。随后,通过现代几何实现的莱布尼茨-马赫世界观,我们获得了详细的理论理解星系盘应如何与$D\approx 2$准分形IGM相互作用。这种理解采取了一种表面上不起眼的比例关系的形式,它与标准光度质量模型应用于数据,表明$a_F \approx 1.2\times 10^{-10}\, mtrs/sec^2$是明确嵌入在该数据。由于标度关系也产生重子塔利-费雪关系,但用$a_F$代替了$a_0$,我们就可以明确地得出结论:$a_0$和$a_F$实际上是同一个东西。

英文摘要:

The irrefutable successes of MOND are predicated upon the idea that a critical gravitational acceleration scale, $a_0$, exists. But, beyond its role in MOND, the question: 'Why should a critical gravitational acceleration scale exist at all?' remains unanswered. There is no deep understanding about what is going on. Over roughly the same period that MOND has been a topic of controversy, Baryshev, Sylos Labini, Pietronero and others have been arguing, with equal controversy in earlier years, that, on medium scales at least, material in the universe is distributed in a quasi-fractal $D\approx 2$ fashion. There is a link: if the idea of a quasi-fractal $D \approx 2$ universe on medium scales is taken seriously then there is an associated characteristic mass surface density scale, $Σ_F$ say, and an associated characteristic gravitational acceleration scale, $a_F = 4 πG Σ_F$. If, furthermore, the quasi-fractal structure is taken to include the inter-galactic medium, then it is an obvious step to consider the possibility that $a_0$ and $a_F$ are the same thing. Subsequently, via a modern geometric realization of the Leibniz-Mach worldview, we obtain a detailed theoretical understanding of how galaxy disks should interact with a $D\approx 2$ quasi-fractal IGM. This understanding takes the form of a superficially unremarkable scaling relationship which, used with standard photometric mass-modelling applied to SPARC data, shows that $a_F \approx 1.2\times 10^{-10}\, mtrs/sec^2$ is explicitly embedded in that data. Since the scaling relationship also gives rise to the Baryonic Tully-Fisher Relationship, but with $a_0$ replaced by $a_F$, we are led unambiguously to the conclusion that $a_0$ and $a_F$ are, in reality, one and the same thing.

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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