Gravitational Radiation at Infinity with Non-Negative Cosmological Constant
dc.contributor.author | Martín Senovilla, José María | |
dc.date.accessioned | 2022-11-21T13:58:54Z | |
dc.date.available | 2022-11-21T13:58:54Z | |
dc.date.issued | 2022-09-12 | |
dc.identifier.citation | Universe 8(9) : (2022) // Article ID 478 | es_ES |
dc.identifier.issn | 2218-1997 | |
dc.identifier.uri | http://hdl.handle.net/10810/58464 | |
dc.description.abstract | The existence of gravitational radiation arriving at null infinity J+, i.e., escaping from the physical system, is addressed in the presence of a non-negative cosmological constant Λ≥0. The case with vanishing Λ is well understood and relies on the properties of the News tensor field (or the News function) defined at J+. The situation is drastically different when Λ>0, where there is no known notion of ‘News’ with similar good properties. In this paper, both situations are considered jointly from a tidal point of view, that is, taking into account the strength (or energy) of the curvature tensors. The fundamental object used for this purposes is the asymptotic (radiant) super-momentum, a causal vector defined at infinity with remarkable properties. This leads to a novel characterization of gravitational radiation valid for the general case with Λ≥0, which has been proven to be equivalent when Λ=0 to the standard one based on News. Here, the implications of this result when Λ>0 are analyzed in detail. A general procedure to construct ‘News tensors’ when Λ>0 is depicted, a proposal for asymptotic symmetries is provided, and an example of a conserved charge that may detect gravitational radiation at J+ is exhibited. A series of illustrative examples is listed as well. | es_ES |
dc.description.sponsorship | Research supported by Basque Government grant numbers IT956-16 and IT1628-22, by Grant FIS2017-85076-P funded by the Spanish MCIN/AEI/10.13039/501100011033, and by “ERDF: A way of making Europe”. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.subject | gravitational radiation | es_ES |
dc.subject | Λ ≥ 0 | es_ES |
dc.subject | asymptotic structure | es_ES |
dc.title | Gravitational Radiation at Infinity with Non-Negative Cosmological Constant | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.date.updated | 2022-09-22T12:04:01Z | |
dc.rights.holder | © 2022 by the authors.Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/ 4.0/). | es_ES |
dc.relation.publisherversion | https://www.mdpi.com/2218-1997/8/9/478 | es_ES |
dc.identifier.doi | 10.3390/universe8090478 | |
dc.departamentoes | Física | |
dc.departamentoeu | Fisika |
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Except where otherwise noted, this item's license is described as © 2022 by the authors.Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/ 4.0/).