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arXiv 2201.06034astro-ph.GAgr-qc
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Milky Way和M31旋转曲线:$Λ$ CDM与MOND

Milky Way and M31 rotation curves: $Λ$CDM vs. MOND

De-Chang Dai, Glenn Starkman, Dejan Stojkovic

摘要:

我们分析了银河系和M31星系的现有旋转曲线数据,这些数据延伸到非常大的距离和低加速度。我们发现一个系统的径向加速度的弱加速度(大距离)部分的下降趋势。在$Λ$ CDM EAGLE模拟中已经注意到类似的下降趋势,而与通用MOND预测的偏差需要归因于外部场效应,或者可能是事后选择的加速函数$μ(x)$。

英文摘要:

We analyze the existing rotation-curve data of the Milky Way and M31 galaxies that extends to very large distances and low accelerations. We find a systematic downward trend in the weak acceleration (large distances) segment of the radial acceleration. A similar downward trend has been noticed in the $Λ$CDM EAGLE simulation, while the deviation from the generic MOND prediction would need to be ascribed to an external field effect, or possibly a post facto selected acceleration function $μ(x)$.

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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