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arXiv 2412.10285astro-ph.GA
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自相互作用超轻暗物质中星系的量子尺度

Quantum Scales of Galaxies from Self-interacting Ultralight Dark Matter

Jae-Weon Lee, Chueng-Ryong Ji

AI总结:

本文在自相互作用超轻暗物质模型中推导矮星系的质量、尺寸、加速度和角动量等特征尺度,指出微弱自相互作用会显著改变这些尺度,并论证该模型比非相互作用情形能更好地解释宇宙学观测。

摘要:

我们在自相互作用超轻暗物质(ULDM)模型中推导了矮星系物理量的特征尺度,如质量、尺寸、加速度和角动量。由于ULDM的质量很小,即使微弱的自相互作用也能在托马斯-费米极限下极大地改变这些尺度。我们认为这些特征尺度与观测到的星系之谜有关。ULDM场的振荡可以解释当前暗物质的宇宙学密度。许多宇宙学约束表明,自相互作用ULDM的能量尺度$\ ilde{m}$通常在$10~eV$量级,而非相互作用情况下的质量$m$约为$10^{-21}~eV$。与非相互作用情况相比,自相互作用ULDM为宇宙学观测提供了更好的解释。

英文摘要:

We derive the characteristic scales for physical quantities of dwarf galaxies, such as mass, size, acceleration, and angular momentum, within the self-interacting ultralight dark matter (ULDM) model. Due to the small mass of ULDM, even minor self-interactions can drastically alter these scales in the Thomas-Fermi limit. We suggest that these characteristic scales are connected to mysteries of observed galaxies. Oscillation of ULDM field can explain the current cosmological density of dark matter. Many cosmological constraints suggest that the energy scale $\tilde{m}$ for self-interacting ULDM is typically of the order $10~eV$, whereas the mass $m$ for the non-interacting case is around $10^{-21}~eV$. Self-interacting ULDM provides the better explanation for cosmological observations than the non-interacting case.

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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