arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0801.1442astro-phhep-th
收藏

暗物质是BEC还是标量场?

Is dark matter a BEC or scalar field?

Jae-Weon Lee

摘要:

本文简要回顾了玻色-爱因斯坦凝聚体(BEC)或玻色子星模型的发展历史,即超轻标量暗物质粒子凝聚成单一BEC量子态的星系暗物质晕。晕可以被描述为一个自引力的,可能是自相互作用的,相干的标量场。在比星系大的尺度上,暗物质表现得像冷的暗物质,而在该尺度以下,量子力学性质抑制了暗物质结构的形成,这是由于由质量$m\st{>}{\sim}10^{-24} eV$和粒子的自相互作用决定的最小长度尺度。这一性质可以缓解$Λ$ CDM模型的尖点问题和卫星缺失问题。此外,该模型很好地再现了观测到的旋涡星系和矮星系的自转曲线,这使得该模型很有前途。

英文摘要:

This is a brief review on the history of the Bose-Einstein condensate (BEC) or boson star model of galactic dark matter halos, where ultra-light scalar dark matter particles condense in a single BEC quantum state. The halos can be described as a self-gravitating, possibly self-interacting, coherent scalar field. On a scale larger than galaxies, dark matter behaves like cold dark matter while below that scale the quantum mechanical nature suppresses the dark matter structure formation due to the minimum length scale determined by the mass $m\st{>}{\sim}10^{-24} eV$ and the self-interaction of the particles. This property could alleviate the cusp problem and missing satellite problems of the $Λ$CDM model. Furthermore, this model well reproduces the observed rotation curves of spiral and dwarf galaxies, which makes the model promising.

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。

↑