Spacetimes with a preferred null direction and a two-dimensional group of isometries: the null dust case
| dc.contributor.author | Santos, C. A. Kolassis | en |
| dc.contributor.author | N. O. | en |
| dc.date.accessioned | 2015-11-24T18:35:13Z | |
| dc.date.available | 2015-11-24T18:35:13Z | |
| dc.identifier.issn | 0264-9381 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/17063 | |
| dc.rights | Default Licence | - |
| dc.title | Spacetimes with a preferred null direction and a two-dimensional group of isometries: the null dust case | en |
| heal.abstract | The authors consider spacetimes of general relativity admitting a preferred null direction l mu and a two-dimensional Abelian group of isometries G 2 . A null tetrad formulation of the Killing equations is given, as well as a classification of G 2 according to the orientation of l mu with respect to the group transitivity surfaces. Two theorems concerning the action of the isometry group on l mu are presented: the first one deals with spacetimes admitting at least one Killing vector, while the second one deals with spacetimes admitting a G 2 . The Einstein field equations with a shear-free and diverging null dust source are integrated under the assumptions: (i) the spacetime admits an Abelian G 2 whose transitivity surfaces are non-orthogonal to and do not contain the null dust propagation vector; (ii) there exists a Killing vector k mu whose magnitude is almost everywhere bounded at the endpoints of the null dust rays. These spacetimes are of Petrov type II, non-asymptotically flat, and the G 2 is non-orthogonally transitive. By switching off the null dust the authors have explicitly obtained the underlying vacuum metrics which generalise some of the diverging Petrov type D vacuum metrics found by Kinnersley (1969). | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | http://stacks.iop.org/0264-9381/4/i=3/a=018 | - |
| heal.journalName | Classical and Quantum Gravity | en |
| heal.journalType | peer reviewed | - |
| heal.publicationDate | 1987 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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