论文标题
暗区域墙壁可以解释观察到的卫星平面
Dark sector domain walls could explain the observed planes of satellites
论文作者
论文摘要
众所周知，在银河系和附近的其他星系周围观察到的“卫星平面”很难在$λ$ CDM范式下进行解释。在这里，我们提出了一个替代解决方案：在理论中产生的域墙，其对称性标量字段与物质结合。由于耦合的问题，卫星星系在穿过域壁时会经历第五力，导致一部分卫星，轨道限制在域壁平面上。我们使用包含点状卫星和无限域壁的玩具模型的简单模拟来证明这种效果，并探索各种平面度量指标在检测此效果方面的功效。我们认为，这是对观察到的卫星平面的第一个潜在的“新物理”解释，这些卫星没有消失。
The observed `planes of satellites' around the Milky Way and other nearby galaxies are notoriously difficult to explain under the $Λ$CDM paradigm. Here, we propose an alternative solution: domain walls arising in theories with symmetry-breaking scalar fields coupled to matter. Because of the matter coupling, satellite galaxies experience fifth forces as they pass through domain walls, leading to a subset of satellites with orbits confined to the domain wall plane. We demonstrate this effect using simple simulations of a toy model comprising point-like satellites and an infinite domain wall, and explore the efficacy of various planarity metrics in detecting this effect. We believe this is the first potential `new physics' explanation for the observed planes of satellites which does not do away with dark matter.
