Gravitational collapse of a self-gravitating unidirectional fluid flow

被引：8
|
作者：
Sheikh, Umber [1 ]
Bhatti, M. Z. [2 ]
Yousaf, Z. [2 ]
机构：
[1] Natl Text Univ, Dept Appl Sci, Faisalabad 37610, Pakistan
[2] Univ Punjab, Dept Math, Quaid I Azam Campus, Lahore 54590, Pakistan
来源：
NEW ASTRONOMY | 2021年 / 84卷
关键词：
Gravitation; Gravitational collapse; Isotropic pressure; Self-gravitation; STABILITY;
D O I：
10.1016/j.newast.2020.101533
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
This paper explores the collapsing process of a unidirectional isotropic matter configuration. The junction conditions for a static exterior geometry and the non-static interior geometry are expressed in terms of the cosmological constant. The time-lapse for the appearance of the black hole and the cosmological horizon is calculated. It is observed that in the de-Sitter space, the unidirectional perfect fluid flow does not make the collapse disappear. The vacuum energy of the cosmological constant makes the collapsing process quite slow and affects the time-lapse of horizon formation. Moreover, the presence of string tension increases the time-lapse of horizon formation.
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页数：5
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