Spherically symmetric vacuum solutions arising from trace dynamics modifications to gravitation

被引:16
作者
Adler, Stephen L. [1 ]
Ramazano, Fethi M. [2 ]
机构
[1] Inst Adv Study, Einstein Dr, Princeton, NJ 08540 USA
[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2015年 / 24卷 / 02期
基金
美国国家科学基金会;
关键词
Effective action; modified gravity; spherical symmetry; dark energy; horizon; Schwarzschild solution; McVittie Ansatz; EVENT HORIZONS; BLACK-HOLES;
D O I
10.1142/S021827181550011X
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We derive the equations governing static, spherically symmetric vacuum solutions to the Einstein equations, as modified by the frame-dependent effective action (derived from trace dynamics) that gives an alternative explanation of the origin of "dark energy". We give analytic and numerical results for the solutions of these equations, first in polar coordinates, and then in isotropic coordinates. General features of the static case are that: (i) there is no horizon, since g00 is nonvanishing for finite values of the polar radius, and only vanishes (in isotropic coordinates) at the internal singularity, (ii) the Ricci scalar R vanishes identically, and (iii) there is a physical singularity at cosmological distances. The large distance singularity may be an artifact of the static restriction, since we find that the behavior at large distances is altered in a time-dependent solution using the McVittie Ansatz.
引用
收藏
页数:38
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