长期以来，暗物质（DM）模拟预测的陡峭中心密度尖峰与观测到的较浅核心之间存在矛盾，特别是矮星系中内剖面的多样性。基于新的费米子等温晕解释，本文识别出一种物理机制——简并性诱导衰减，其中费米子暗物质的简并内核通过抑制周围密度，在大尺度上产生影响。这种效应在密集的核物质环境中仍然存在。在分层结构形成框架下，最小构成子晕中的简并性诱导低密度区域，这些区域集体形成宿主暗物质晕的金 King 型核心，其核心密度半径关系与观测一致。该情景通过构成子晕的平均简并性变化解释了 DM 内剖面的多样性，并表明这种多样性与晕形成历史有关。因此，核心问题可能在标准 '冷' 暗物质范式内得到解决，而无需引入强核物质反馈，而是指向暗物质的费米子性质。
英文摘要：
The longstanding cusp-core problem--the discrepancy between the steep central density cusps predicted by cold dark matter (DM) simulations and certain shallow cores observed in dwarf galaxies, in particular the associated diversity of inner profiles--remains hotly debated despite decades of study. Building on a new interpretation of fermionic isothermal halos, we identify a physical mechanism--degeneracy-induced depletion--in which degenerate inner cores of fermionic DM suppress the surrounding density over large scales. This effect persists even in dense baryonic environments. Within the framework of hierarchical structure formation, degeneracies developed in the smallest constituent subhalos induce low-density regions that collectively configure into a King-type core of the host DM halo, with a core density-radius relation consistent with observations. This scenario accounts for the diversity of DM inner profiles through variation in the average degeneracy of constituent subhalos, and suggests a connection between this diversity and the halo formation history. Thus, the cusp-core problem may be reconciled within the standard "cold" DM paradigm without invoking strong baryonic feedback, instead pointing to the fermionic nature of DM.
The SLUGGS Survey: Breaking degeneracies between dark matter, anisotropy and the IMF using globular cluster subpopulations in the giant elliptical NGC 5846
Institut de Radioastronomie Millimétrique（毫米波射电天体物理研究所）；European Southern Observatory（欧洲南方天文台）；Chalmers University of Technology（查尔摩斯理工大学）；University of Virginia（弗吉尼亚大学）；Yale University（耶鲁大学）；INAF Osservatorio Astronomico di Arcetri（意大利国家天体物理研究所阿切特里天文台）；California Institute of Technology（加州理工学院）；Observatoire de Paris（巴黎天文台）；Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理研究所）；Astrophysics Research Institute, Liverpool John Moores University（利物浦约翰摩尔斯大学天体物理学研究所）；Leiden Observatory, Leiden University（莱顿大学莱顿天文台）
Central stellar depletion in the Draco dwarf from Subaru photometry
Institute for Astronomy, University of Edinburgh（爱丁堡大学天文研究所）；Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK（英国爱丁堡黑门山皇家天文台）；Astronomical Science Program, The Graduate University for Advanced Studies, SOKENDAI（日本国立综合研究大学院大学天文学科学项目）；National Astronomical Observatory of Japan（日本国立天文台）；Institute of Corpuscular Physics (IFIC), CSIC–Universitat de València（瓦伦西亚大学-CSIC粒子物理研究所）；VALER, Calle Mayor, 83, 1, 12001 Castellón de la Plana, Spain（西班牙卡斯特利翁德拉普拉纳大街83号1单元VALER）
Milky Way Dynamics Favor Dark Matter over Modified Gravity Models
Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；University of Science and Technology of China（中国科学技术大学）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；University of Chinese Academy of Sciences（中国科学院大学）；University of Saint Andrews（圣安德鲁斯大学）
