Cosmic antigravitation and stability of circular orbits
Abstract
We calculate circular and epicyclic frequencies for some spherical models embedded into dark energy background and determine the zero-gravity distance and the distance from the centre where epicyclic frequency vanishes. The latter means that circular orbits become unstable at greater distances.
- Publication:
-
Astronomical and Astrophysical Transactions
- Pub Date:
- August 2013
- Bibcode:
- 2013A&AT...28..161M
- Keywords:
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- Stellar dynamics;
- Orbits: Stability;
- Cosmology: Dark energy