通过绘制莱曼阿尔法发射线宇宙纤维状结构来辨别暗物质的本质

本文探讨了利用莱曼阿尔法发射线追踪宇宙纤维状结构以区分暗物质模型的方法。研究表明，在特定红移下，纤维状结构的平滑度与面亮度差异可作为区分标准暗物质模型与温暗物质模型的观测特征。

arXiv:2601.22677v2 Announce Type: replace Abstract: The standard $\Lambda$CDM cosmological model predicts that cosmic filaments are highly clumpy, whereas warm dark matter -- invoked to address small-scale challenges in $\Lambda$CDM -- produces filaments that are noticeably smoother and less structured. In this work, we investigate the potential of Lyman $\alpha$ (Ly$\alpha$) emission to trace cosmic filaments at redshifts $z=2.5$ and $z=4$, and assess their potential for constraining the nature of dark matter. Our analysis shows that Ly$\alpha$ filaments provide a promising observational probe of dark matter: at $z=4$, differences in filament smoothness and surface brightness serve as distinctive signatures between models. Looking ahead, the upcoming generation of 30-meter class telescopes will be critical for enabling these measurements, offering a compelling opportunity to distinguish the nature of dark matter by mapping the structure of cosmic filaments.