New time-dependent solutions of viable Horndeski gravity. Issue 9 (27th September 2022)

• Record Type: Journal Article
• Authors: Saadati, Reza; Giusti, Andrea; Faraoni, Valerio; Shojai, Fatimah
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2022:Issue 9(2022)
• Publication Date: 2022-09-27
• Subjects: Exact solutions -- black holes and black hole thermodynamics in GR and beyond -- Gauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theories -- modified gravity; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2022/09/067
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: We generate new spherical and time-dependent solutions of viable Horndeski gravity by disforming a solution of the Einstein equations with scalar field source and positive cosmological constant. They describe dynamical objects embedded in asymptotically FLRW spacetimes and contain apparent horizons and a finite radius singularity that evolve in time in peculiar ways apparently not encountered before in Einstein and "old" scalar-tensor gravity.