Tidal forces in inhomogeneous cosmological models
Abstract
The tidal field is computed for the case where the larger group and its surroundings are modelled by an inhomogeneous Tolman-Bondi spherically symmetric dust (SSD) cosmological model. The tidal tensor (TT) in the Newtonian limit for any SSD system is considered, as is the TT for a spherical dust system in general relativity. In addition, tidal mass is defined via TT = angular factors x G x tidal mass/(r cubed). It is shown that tidal mass is not conserved and its evolution must be followed in order to perform calculations of tidal interactions in an expanding universe.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1980
- DOI:
- 10.1086/157750
- Bibcode:
- 1980ApJ...236..335O
- Keywords:
-
- Cosmic Dust;
- Cosmology;
- Galactic Clusters;
- Tides;
- Inhomogeneity;
- Newton Theory;
- Perturbation Theory;
- Relativity;
- Astrophysics