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arXiv 1502.07301astro-ph.COastro-ph.GAgr-qchep-phhep-th
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宇宙弦与球状星团的起源

Cosmic Strings and the Origin of Globular Clusters

Alistair Barton, Robert H. Brandenberger, Ling Lin

摘要:

我们假设宇宙弦环是球状星团吸积的种子。通过要求在弦环上吸积的天体质量分布的峰值与银河系中观测到的球状星团质量分布的峰值一致来固定宇宙弦张力,然后计算了期望的球状星团的数密度和质量函数,并与观测值进行了比较。我们的假设自然地解释了为什么球状星团是星系中最古老、密度最大的天体,以及为什么它们会在星系的晕中被发现。

英文摘要:

We hypothesize that cosmic string loops are the seeds about which globular clusters accrete. Fixing the cosmic string tension by demanding that the peak in the distribution of masses of objects accreting onto string loops agrees with the peak in the observed mass distribution of globular clusters in our Milky Way galaxy, we then compute the expected number density and mass function of globular clusters, and compare with observations. Our hypothesis naturally explains why globular clusters are the oldest and most dense objects in a galaxy, and why they are found in the halo of the galaxy.

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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