Constraining scalar-tensor modified gravity with gravitational waves and large scale structure surveys

被引：48

作者：

Baker, Tessa ^{[1
]}

Harrison, Ian ^{[2
,3
]}

机构：

[1] Queen Mary Univ London, Mile End Rd, London E1 4NS, England

[2] Univ Manchester, Dept Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England

[3] Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2021年 / 01期

基金：

欧洲研究理事会;

关键词：

cosmological parameters from LSS; gravitational waves / experiments; modified gravity; DARK ENERGY; HUBBLE CONSTANT; BLACK-HOLES; BINARIES;

D O I：

10.1088/1475-7516/2021/01/068

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The first multi-messenger gravitational wave event has had a transformative effect on the space of modified gravity models. In this paper we study the enhanced tests of gravity that are possible with a future set of gravitational wave standard siren events. We perform MCMC constraint forecasts for parameters in Horndeski scalar-tensor theories. In particular, we focus on the complementarity of gravitational waves with electromagnetic large-scale structure data from galaxy surveys. We find that the addition of fifty low redshift (z less than or similar to 0.2) standard sirens from the advanced LIGO network offers only a modest improvement (a factor 1.1-1.3, where 1.0 is no improvement) over existing constraints from electromagnetic observations of large-scale structures. In contrast, high redshift (up to z similar to 10) standard sirens from the future LISA satellite will improve constraints on the time evolution of the Planck mass in Horndeski theories by a factor similar to 5. By simulating different scenarios, we find this improvement to be robust to marginalisation over unknown merger inclination angles and to variation between three plausible models for the merger source population.

引用

页数：41

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