Constraints on the distance duality relation with standard sirens
Constraints on the distance duality relation with standard sirens
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DOI：
10.1088/1475-7516/2020/12/019
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发表时间：
2020-07
影响因子：
6.4
通讯作者：
N. B. Hogg;M. Martinelli;S. Nesseris
中科院分区：
文献类型：
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作者：
N. B. Hogg;M. Martinelli;S. Nesseris
我们使用引力波（GW）标准警报，除了Ia型超新星（SNIa）和重子声振荡（BAO）模拟数据，预测电磁和引力距离对偶关系（DDR）的约束。我们利用一个参数化的方法，基于一个特定的DDR违规模型，沿着的机器学习的重建方法的基础上的遗传算法。我们发现，GW提供了一种替代使用的BAO数据来约束违反DDR，达到3%的约束，我们认为违反参数时，结合SNIa，这是只有改善了1.14倍，如果一个人，而不是考虑BAO和SNIa的组合。我们还调查的可能性，一个被忽视的修改重力可能会导致错误的检测DDR的违规行为，即使筛选机制是活跃的。我们发现，这样的错误检测可能是非常显着的，对于非常极端的修正重力场景高达10σ，而在更现实的情况下，这降低到14 σ。由于SNIa+GW和SNIa+BAO组合之间引入的张力，错误检测还可以为正在发挥作用的改进的重力机制提供确凿证据。
We use gravitational wave (GW) standard sirens, in addition to Type Ia supernovae (SNIa) and baryon acoustic oscillation (BAO) mock data, to forecast constraints on the electromagnetic and gravitational distance duality relations (DDR) . We make use of a parameterised approach based on a specific DDR violation model, along with a machine learning reconstruction method based on the Genetic Algorithms. We find that GW provide an alternative to the use of BAO data to constrain violations of the DDR, reaching 3% constraints on the violation parameter we consider when combined with SNIa, which is only improved by a factor of ≈1.4 if one instead considers the combination of BAO and SNIa. We also investigate the possibility that a neglected modification of gravity might lead to a false detection of DDR violations, even when screening mechanisms are active. We find that such a false detection can be extremely significant, up to ≈10σ for very extreme modified gravity scenarios, while this reduces to ≈4σ in a more realistic case. False detections can also provide a smoking gun for the modified gravity mechanism at play, as a result of the tension introduced between the SNIa+GW and SNIa+BAO combinations.