A bound system in the expanding universe with modified holographic Ricci dark energy and dark matter
A bound system in the expanding universe with modified holographic Ricci dark energy and dark matter
复制标题
膨胀宇宙中的束缚系统,具有修改后的全息里奇暗能量和暗物质
DOI:
10.1007/s10509-014-2161-y
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发表时间:
2015-02
期刊:
影响因子:
--
通讯作者:
Peng-Fei Duan
中科院分区:
文献类型:
--
作者:
En-Kun Li;Yu Zhang;Jin-Ling Geng;Peng-Fei Duan
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.
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影响因子:
5
作者:
V. Faraoni;Audrey Jacques
通讯作者:
V. Faraoni;Audrey Jacques
影响因子:
5
作者:
Ghaffari, S.;Dehghani, M. H.;Sheykhi, A.
通讯作者:
Sheykhi, A.
影响因子:
5
作者:
S. Nesseris;L. Perivolaropoulos
通讯作者:
S. Nesseris;L. Perivolaropoulos
DOI:
10.1086/305956
发表时间:
1998-03
期刊:
The Astrophysical Journal
影响因子:
--
作者:
F. Cooperstock;V. Faraoni;D. Vollick
通讯作者:
F. Cooperstock;V. Faraoni;D. Vollick
DOI:
10.1140/epjc/s10052-008-0858-1
发表时间:
2008-04
期刊:
The European Physical Journal C
影响因子:
--
作者:
Lixin Xu;Wenbo Li;Jianbo Lu
通讯作者:
Lixin Xu;Wenbo Li;Jianbo Lu