Constraints on Einstein-dilaton Gauss-Bonnet gravity with Taiji

Abstract

In the 2030s, space-based gravitational-wave (GW) detectors will exhibit unprecedented sensitivity in the millihertz frequency band, greatly expanding the potential for testing theories of gravity compared to ground-based GW detectors. Inspired by effective string theory, Einstein-dilaton Gauss-Bonnet (EdGB) gravity introduces an extra dilaton scalar field that is directly coupled to higher curvature terms. Here, we investigate the capability of Taiji to constrain the parameters of EdGB gravity by analyzing GWs from massive black hole binaries (MBHBs). We utilize the parameterized post-Einsteinian (ppE) waveform with the leading order EdGB corrections for the inspiral phase of MBHBs. The constraints on the coupling constants are obtained by performing Fisher matrix analysis. With different mass ratios and spins ${\chi }_i$ at redshifts $z=2,3,4,5$, the $1\sigma$ bounds on the parameter $\alpha$ have the same order of magnitude: $\sqrt{\alpha }\sim 10^7$m.

14 pages, 2 figures. version accepted by EPJC

References in corpus (10)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• The Confrontation between General Relativity and Experiment
• Comparison of post-Newtonian templates for compact binary inspiral signals in gravitational-wave detectors
• Use and Abuse of the Fisher Information Matrix in the Assessment of Gravitational-Wave Parameter-Estimation Prospects
• Are black holes in alternative theories serious astrophysical candidates? The case for Einstein-Dilaton-Gauss-Bonnet black holes
• Recent Advances on Inflation
• Higher-Derivative Corrected Black Holes: Perturbative Stability and Absorption Cross-Section in Heterotic String Theory
• Black Holes in the Dilatonic Einstein-Gauss-Bonnet Theory in Various Dimensions I -- Asymptotically Flat Black Holes --
• A Refined Einstein-Gauss-Bonnet Inflationary Theoretical Framework
• Non-Minimally Coupled Einstein Gauss Bonnet Inflation Phenomenology in View of GW170817