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DC Field | Value | Language |
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dc.contributor.author | Chakrabarti, Soumya | - |
dc.contributor.author | Said, Jackson | - |
dc.date.accessioned | 2022-02-18T06:04:54Z | - |
dc.date.available | 2022-02-18T06:04:54Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Chakrabarti, S., & Said, J. L. (2020). Geodesic congruences and a collapsing stellar distribution in f (T) theories. Physical Review D, 101(12), 124044. | en_GB |
dc.identifier.uri | https://www.um.edu.mt/library/oar/handle/123456789/89389 | - |
dc.description.abstract | Teleparallel gravity (TG) describes gravitation as a torsional- rather than curvature-based effect. As in curvature-based constructions of gravity, several different formulations can be proposed, one of which is the teleparallel equivalent of general relativity (TEGR) which is dynamically equivalent to GR. In this work, we explore the evolution of a spatially homogeneous collapsing stellar body in the context of two important modifications to TEGR, namely f (T ) gravity, which is the TG analog of f (R ) gravity, and a nonminimal coupling with a scalar field which has become popular in TG for its effects in cosmology. We explore the role of geodesic deviation to study the congruence of nearby particles in lieu of the Raychaudhuri equation. We find f (T ) models that satisfy the null energy condition and describe interesting collapse profiles. In the case of a nonminimally coupled scalar field, we also find potential collapse models with intriguing scalar field evolution profiles. | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.rights | info:eu-repo/semantics/restrictedAccess | en_GB |
dc.subject | Geodetic astronomy | en_GB |
dc.subject | Stellar dynamics | en_GB |
dc.subject | Scalar field theory | en_GB |
dc.subject | General relativity (Physics) | en_GB |
dc.subject | Riemannian manifolds | en_GB |
dc.subject | Ricci flow | en_GB |
dc.title | Geodesic congruences and a collapsing stellar distribution in f (T) theories | en_GB |
dc.type | article | en_GB |
dc.rights.holder | The copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder. | en_GB |
dc.description.reviewed | peer-reviewed | en_GB |
dc.identifier.doi | 10.1103/PhysRevD.101.124044 | - |
dc.publication.title | Physical Review D | en_GB |
Appears in Collections: | Scholarly Works - InsSSA |
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