Future constraints on dynamical dark-energy using gravitational-wave standard sirens

Abstract

The detection of gravitational waves (GW) by the LIGO and Virgo collaborations offers a whole new range of possible tests and opens up a new window which may shed light on the nature of dark energy and dark matter. In the present work we investigate how future gravitational waves data could help to constrain different dynamical dark energy models. In particular, we perform cosmological forecastings of a class of well known and most used dynamical dark energy models using the third-generation gravitational wave detector, the Einstein Telescope. We have considered 1000 simulated GW events in order to constrain the parameter space of the dynamical dark energy models. Our analyses show that the inclusion of the GW data from the Einstein Telescope, significantly improves the parameter space of the dynamical dark energy models compared to their constraints extracted from the standard cosmological probes, namely, the cosmic microwave observations, baryon acoustic oscillations distance measurements, Supernove type Ia, and the Hubble parameter measurements. 95.36.+x, 95.35.+d, 98.80.Es

Do we have any hope of detecting scattering between dark energy and baryons through cosmology?

“…These have focused on the DE equation of state (EoS) w x and its time evolution, or on models of modified gravity that can account for DE, by studying imprints on the background evolution and on the late-time growth of structure (see e.g. Ishak et al 2006;Mena et al 2006;De Felice et al 2008;Giannantonio et al 2010;Lombriser et al 2012;Martinelli et al 2012;Hu et al 2016;Nunes et al 2017a,b;Renk et al 2017;Peirone et al 2018;Vagnozzi et al 2018;Du et al 2019;Yang et al 2019a), and finally on the propagation of astrophysical gravitational waves (see e.g. Creminelli & Vernizzi 2017;Sakstein & Jain 2017;Ezquiaga & Zumalacárregui 2017;Boran et al 2018;Baker et al 2017;Visinelli et al 2018;Crisostomi & Koyama 2018;Langlois et al 2018;Ezquiaga & Zumalacárregui 2018;.…”

Listening to the sound of dark sector interactions with gravitational wave standard sirens

“…We now very briefly summarize the procedure adopted for generating the mock GW data and further details on the generation of the mock GW standard sirens dataset are presented in Appendix A. In addition, we encourage the reader to consult [166] for further technical details on the procedure, which is the same as that adopted here. The first step is to specify the expected GW sources.…”

“…The possibility of using SS to constrain the late-time dynamics of the Universe, including the Hubble constant H 0 , the matter density parameter Ω m0 , and the dark energy equation of state w x , has been contemplated in a number of works: for an incomplete list, see e.g. [157,158,159,160,161,162,163,164,165,166,167]. Moreover, the first work combining the GWs probe and particle collider constraints was put forward in [168].…”

“…In this work, it is our goal to revisit the possibility of using GW SS measurements to study interactions between DM and DE. Basing ourselves on the formalism of [166] (see also [170,171,172] for later work), we explore how the use of future GW data can improve constraints on DM-DE interactions, within the context of two stable interacting DE models proposed by the present authors in [173].…”

Dark degeneracy I: Dynamical or interacting dark energy?

“…In particular, the gravitational wave event GW170817 [41] from a neutron star merger with its electromagnetic counterpart GRB170817A [50] has provided strong constraints on the possible physics of the dark sector [38,39,51,52,53,54,55,56,57]. GWs can also be used to measure a variation of the Planck mass [38,58,59,60,61,62] and test the late-time cosmology [63,64,65] through Standard Sirens [66,67]. Constraints that can be obtained from Standard Sirens have also been discussed for dynamical DE [68,69] and interacting models [62,70,71,72,73].…”