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能否通过LIGO检测到非毁灭性的暗物质?

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不能检测到来自合并黑洞的引力波,限制了暗物质粒子相互作用. 这项研究使用LIGO数据对暗物质-核子截面设定了基准限制,为未来引力波天文学发现铺平了道路.

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科学领域:

  • 天体物理学和宇宙学
  • 粒子物理学 粒子物理学
  • 引力波天文学 引力波天文学

背景情况:

  • 在中子星中积聚的暗物质 (DM) 可能会形成低质量黑洞.
  • 暗物质粒子的特性 (质量,稳定性,核子相互作用) 是这个过程的关键.
  • 像LIGO这样的引力波探测器为暗物质物理学提供了新的观测窗口.

研究的目的:

  • 为了限制暗物质粒子和核子之间的相互作用截面.
  • 对于这些约束,利用来自特定黑洞合并的引力波的不检测.
  • 探索引力波探测器作为暗物质粒子探测器的潜力.

主要方法:

  • 从LIGO的O3观测运行中分析引力波数据.
  • 模拟来自中子星积聚暗物质的亚-2.5M黑洞的形成.
  • 基于非检测的暗物质-核子相互作用截面 (σ_{χn}) 设置上限.

主要成果:

  • 获得的基准约束: bosonic DM (m_{χ}∼PeV或m_{χ}∼GeV) 的 σ_{χn}≥O(10^{-47}) cm2 和 fermionic DM (m_{χ}∼103 PeV) 的 ≥O(10^{-46}) cm2.
  • 约束取决于关于DM参数和二进制中子星合并率的先前假设.
  • 未来的LIGO灵敏度将探测显著低于中微子底层的横截面.

结论:

  • 来自低质量黑洞合并的引力波未被检测,为非消灭的暗物质相互作用提供了严格的约束.
  • 引力波天文学提供了一种强大的,独立的方法来探测粒子暗物质的特性.
  • 未来的引力波探测器灵敏度将测试暗物质对失踪脉冲星的解释.