New timedependent solutions of viable Horndeski gravity
Abstract
We generate new spherical and timedependent 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" scalartensor gravity.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 September 2022
 DOI:
 10.1088/14757516/2022/09/067
 arXiv:
 arXiv:2207.07060
 Bibcode:
 2022JCAP...09..067S
 Keywords:

 Exact solutions;
 black holes and black hole thermodynamics in GR and beyond;
 GaussBonnetLovelockHorndeskiPalatini etc gravity theories;
 modified gravity;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory
 EPrint:
 17 pages, 2 figures