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Models of Anisotropic Self-Gravitating Source in Einstein-Gauss-Bonnet Gravity
Joint Authors
Source
Advances in High Energy Physics
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-12-27
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
In this paper, we have studied gravitational collapse and expansion of nonstatic anisotropic fluid in 5D Einstein-Gauss-Bonnet gravity.
For this purpose, the field equations have been modeled and evaluated for the given source and geometry.
The two metric functions have been expressed in terms of parametric form of third metric function.
We have examined the range of parameter β (appearing in the form of metric functions) for which Θ, the expansion scalar, becoming positive/negative leads to expansion/collapse of the source.
The trapped surface condition has been explored by using definition of Misner-Sharp mass and auxiliary solutions.
The auxiliary solutions of the field equations involve a single function that generates two types of anisotropic solutions.
Each solution can be represented in term of arbitrary function of time; this function has been chosen arbitrarily to fit the different astrophysical time profiles.
The existing solutions forecast gravitational expansion and collapse depending on the choice of initial data.
In this case, wall to wall collapse of spherical source has been investigated.
The dynamics of the spherical source have been observed graphically with the effects of Gauss-Bonnet coupling term α in the case of collapse and expansion.
The energy conditions are satisfied for the specific values of parameters in both solutions; this implies that the solutions are physically acceptable.
American Psychological Association (APA)
Abbas, G.& Tahir, M.. 2018. Models of Anisotropic Self-Gravitating Source in Einstein-Gauss-Bonnet Gravity. Advances in High Energy Physics،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1118234
Modern Language Association (MLA)
Abbas, G.& Tahir, M.. Models of Anisotropic Self-Gravitating Source in Einstein-Gauss-Bonnet Gravity. Advances in High Energy Physics No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1118234
American Medical Association (AMA)
Abbas, G.& Tahir, M.. Models of Anisotropic Self-Gravitating Source in Einstein-Gauss-Bonnet Gravity. Advances in High Energy Physics. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1118234
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118234