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arXiv 2610.08084astro-ph.GAnucl-th

早期星系重元素产生——一种现象学方法

Early galactic heavy element production - a phenomenological approach

B. Wehmeyer, D. Blaschke, F. K. Röpke, G. Röpke

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中文总结 AI 辅助

针对早期贫金属恒星重元素丰度问题,提出预增丰内流解释,采用重元素冻结方法,并推测其源于早期宇宙涨落及原始黑洞形成。

中文摘要 AI 辅助

早期极端贫金属恒星中重元素的高丰度仍是银河系化学演化(GCE)中一个未解决的问题。标准方法,如中子星并合,存在若干困难,并且多种非并合产生通道正在讨论中。在此,我们提出预增丰内流可能解释银河系中低金属丰度恒星中观测到的重元素。为了表征这种预增丰内流的起源条件,我们应用了重元素冻结方法。我们通过拉格朗日参数来表征初始分布,这些参数是温度和化学势的非平衡推广。然后我们推测这种预增丰内流的起源:所需的非平衡条件可能存在于早期宇宙的宇宙学涨落中,并且可能与原始黑洞的形成有关。

英文摘要

The high abundances of heavy elements in early, extremely metal-poor stars is still an unsolved issue in Galactic Chemical Evolution (GCE). Standard approaches, such as mergers of neutron stars, have several difficulties, and several non-merger production channels are under discussion. Here, we suggest that pre-enriched inflow might explain the heavy elements seen in low metallicity stars in the Galaxy. To characterize the conditions of the origin of such a pre-enriched infall, we apply a heavy-element freeze-out approach. We characterize the initial distribution by Lagrange parameters which are nonequilibrium generalizations of temperature and chemical potentials. We then speculate about the origin of such a pre-enriched infall: The required nonequilibrium conditions might be found in cosmological fluctuations in the early Universe, and might be connected to the formation of primordial black holes.

发表机构

  • University of Wroclaw(弗罗茨瓦夫大学)
  • University of Hertfordshire(赫特福德大学)
  • Helmholtz-Zentrum Dresden-Rossendorf (HZDR)(德累斯顿-罗斯多夫亥姆霍兹中心)
  • Center for Advanced Systems Understanding (CASUS)(高级系统理解中心)
  • Zentrum für Astronomie der Universität Heidelberg(海德堡大学天文学中心)
  • Heidelberger Institut für Theoretische Studien(海德堡理论研究所)
  • University of Rostock(罗斯托克大学)

机构由 AI 辅助整理,请以论文原文为准。

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