Journal
ASTROPHYSICS AND SPACE SCIENCE
Volume 355, Issue 1, Pages 187-193Publisher
SPRINGER
DOI: 10.1007/s10509-014-2161-y
Keywords
Bound system; Expanding background; Modified holographic Ricci dark energy
Categories
Funding
- National Natural Science Foundation of China [11347101, 11405076]
- Science Foundation of the Education Department of Yunnan Province [2014Y066]
- Talent Cultivation Foundation of Kunming University of Science and Technology [KKSY201207053, KKSY201356060]
- Department of Human Resources and Social Security of Yunnan Province
Ask authors/readers for more resources
The evolution of a bound system in the expanding background has been investigated in this paper. The background is described by a FRW universe with the modified holographic dark energy model, whose equation of state parameter changes with time and can cross the phantom boundary. To study the evolution of the bound system, an interpolating metric is considered, and on this basis the geodesics of a test particle are given. The equation of motion and the effective potential are also derived from the geodesics. By studying the effective potential and the evolution of the radius of a test particle in the bound system of the Milky Way galaxy, we have found that the galaxy would go through three stages: expands from a singular point; stays in a discoid for a period of time; big rip in the future. With the help of analyzing the critical angular momentum, we find that the test particle needs less angular momentum to escape from the center mass as time passes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available