Disk galaxies and their dark halos as self-organized patterns
Disk galaxies and their dark halos as self-organized patterns
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DOI：
10.1016/j.physletb.2020.136060
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发表时间：
2021-02
影响因子：
4.4
通讯作者：
S. Venkataramani;A. Newell
中科院分区：
文献类型：
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作者：
S. Venkataramani;A. Newell
星系是由具有显著内在随机性的复杂物理过程形成的。因此，令人惊讶的是，推断出的星系中的暗物质分布与观测到的重子分布相关，导致了各种“重子-晕阴谋”。事实上，没有暗物质候选者被明确地确定，这促使人们寻找对这种相关性的替代解释，我们提出了一种由自组织模式的行为驱动的方法。我们提出了一个非局域相对论拉格朗日理论，用于“模式场”作为“有效暗物质”，建立在这个模式场的缺陷与重子物质分布耦合的想法上。该模型适用于旋转支撑系统，计算了星系的旋转曲线，得到了两个分支的径向加速度关系，并推导了中心表面亮度的Freeman极限。
Galaxies are built by complex physical processes with significant inherent stochasticity. It is therefore surprising that the inferred dark matter distributions in galaxies are correlated with the observed baryon distributions leading to various ‘Baryon-Halo conspiracies’. The fact that no dark matter candidate has been definitively identified invites a search for alternative explanations for such correlations and we present an approach motivated by the behaviors of self organized patterns. We propose a nonlocal relativistic Lagrangian theory for a ‘pattern field’ which acts as an ‘effective dark matter’, built on the idea that defects in this pattern field couple to the baryonic matter distribution.The model applies to rotation supported systems and, for them, we compute galactic rotation curves, obtain a radial acceleration relation with two branches, and deduce the Freeman limit for central surface brightness.