Constraining Scalar-Tensor Modified Gravity with Gravitational Waves and Large Scale Structure Surveys
Jul 27, 202039 pages
Published in:
- JCAP 01 (2021) 068
- Published: Jan 29, 2021
e-Print:
- 2007.13791 [astro-ph.CO]
DOI:
- 10.1088/1475-7516/2021/01/068 (publication)
View in:
Citations per year
Abstract: (IOP)
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 ≲ 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 ∼ 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 ∼ 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.Note:
- 29+10 pages, 14 figures, 3 tables. Comments welcome. Main concept in Figure 1, main result in Figure 9. Accepted for publication in JCAP
- gravitation: model
- redshift: high
- redshift: low
- scale: Planck
- Monte Carlo: Markov chain
- gravitational radiation
- structure
- formation
- electromagnetic field: production
- scalar tensor
References(0)
Figures(19)
Loading ...