论文标题
在重力波边界的黑暗能量上的宇宙学限制
Cosmological constraints on dark energy in light of gravitational wave bounds
论文作者
论文摘要
重力波（GW）的约束最近已被用于显着限制暗能量和修饰的重力模型。在这种情况下，由GW衰减和GW引起的黑暗能量不稳定性引起的新界限特别强大，从观察到的GWS的速度中得到补充。我们使用CMB，Redshift空间扭曲，物质功率谱和BAO测量值讨论了生存这些组合边界的Horndeski重力模型的相关线性宇宙学，并计算相应的宇宙学参数约束。幸存的理论受到了强烈的约束，从$λ$ cdm限制了先前的界限，从数量级中加强了范围。我们还评论了一般的宇宙学稳定性约束以及对幸存理论的筛选性质，指出提高的强耦合量表可以确保与引力波约束的兼容性，同时保持太阳系量表上的功能性vainshtein筛选机制。最后，我们讨论了准静态限制以及（约束）与近距离调查相关的可观察物。
Gravitational wave (GW) constraints have recently been used to significantly restrict models of dark energy and modified gravity. New bounds arising from GW decay and GW-induced dark energy instabilities are particularly powerful in this context, complementing bounds from the observed speed of GWs. We discuss the associated linear cosmology for Horndeski gravity models surviving these combined bounds and compute the corresponding cosmological parameter constraints, using CMB, redshift space distortion, matter power spectrum and BAO measurements from the Planck, SDSS/BOSS and 6dF surveys. The surviving theories are strongly constrained, tightening previous bounds on cosmological deviations from $Λ$CDM by over an order of magnitude. We also comment on general cosmological stability constraints and the nature of screening for the surviving theories, pointing out that a raised strong coupling scale can ensure compatibility with gravitational wave constraints, while maintaining a functional Vainshtein screening mechanism on solar system scales. Finally, we discuss the quasi-static limit as well as (constraints on) related observables for near-future surveys.
