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Solutions of the Einstein field equations for a bounded and finite discontinuous source, and its generalization: Metric matching conditions and jumping effects
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Solutions of the Einstein field equations for a bounded and finite discontinuous source, and its generalization: Metric matching conditions and jumping effects
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| dc.contributor.author | Lapiedra Civera, Ramón | |
| dc.contributor.author | Morales Lladosa, Juan Antonio | |
| dc.date.accessioned | 2019-10-28T15:29:07Z | |
| dc.date.available | 2019-10-28T15:29:07Z | |
| dc.date.issued | 2019 | |
| dc.identifier.citation | Lapiedra Civera, Ramón Morales Lladosa, Juan Antonio 2019 Solutions of the Einstein field equations for a bounded and finite discontinuous source, and its generalization: Metric matching conditions and jumping effects Physical Review D 100 6 064045-1 064045-10 | |
| dc.identifier.uri | https://hdl.handle.net/10550/71816 | |
| dc.description.abstract | We consider the metrics of the General Relativity, whose energy-momentum tensor has a bounded support where it is continuous except for a finite step across the corresponding boundary surface. As a consequence, the first derivative of the metric across this boundary could perhaps present a finite step too. However, we can assume that the metric is C1 class everywhere. In such a case, although the partial second derivatives of the metric exhibit finite (no Dirac δ functions) discontinuities, the Dirac δ functions will still appear in the conservation equation of the energy-momentum tensor. As a consequence, strictly speaking, the corresponding metric solutions of the Einstein field equations can only exist in the sense of distributions. Then, we assume that the metric considered is C1 class everywhere and is a solution of the Einstein field equations in this sense. We explore the consequences of these two assumptions, and in doing so we derive the general conditions that constrain the jumps in the second partial derivatives across the boundary. The example of the Oppenheimer-Snyder metric is considered and some new results are obtained on it. Then, the formalism developed in this exploration is applied to a different situation, i.e., to a given generalization of the Einstein field equations for the case where the partial second derivatives of the metric exist but are not symmetric. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physical Review D, 2019, vol. 100, num. 6, p. 064045-1-064045-10 | |
| dc.subject | Gravitació | |
| dc.subject | Relativitat general (Física) | |
| dc.subject | Astrofísica | |
| dc.title | Solutions of the Einstein field equations for a bounded and finite discontinuous source, and its generalization: Metric matching conditions and jumping effects | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2019-10-28T15:29:07Z | |
| dc.identifier.doi | 10.1103/PhysRevD.100.064045 | |
| dc.identifier.idgrec | 134883 | |
| dc.rights.accessRights | open access | es_ES |
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