| dc.contributor.author | Stuchlík, Zdeněk | |
| dc.contributor.author | Calvani, Massimo | |
| dc.date.accessioned | 2007-11-22T09:58:48Z | |
| dc.date.available | 2007-11-22T09:58:48Z | |
| dc.date.issued | 1991 | |
| dc.identifier.citation | General Relativity and Gravitation. 1991, vol. 23, issue 5, p. 507-519. | en |
| dc.identifier.issn | 0001-7701 | |
| dc.identifier.issn | 1572-9532 | |
| dc.identifier.uri | http://hdl.handle.net/10084/64200 | |
| dc.language.iso | en | en |
| dc.publisher | Springer | en |
| dc.relation.ispartofseries | General Relativity and Gravitation | en |
| dc.relation.uri | https://doi.org/10.1007/BF00758012 | |
| dc.title | Null geodesics in black hole metrics with non-zero cosmological constant | en |
| dc.type | article | en |
| dc.identifier.location | Není ve fondu ÚK | cs |
| dc.description.abstract-en | We study the radial motion along null geodesics in the Reissner-Nordström-de Sitter and Kerr-de Sitter space-times. We analyze the properties of the effective potential and we discuss circular orbits. We find that:1) the radius of circular photon orbits in the Reissner-Nordström-de Sitter space-times does not depend on the cosmological constant. We show also how this is related to properties of the optical reference geometry.
2) For a specific range of the cosmological constant, photons with high impact parameter may travel radially between the cosmological horizon and the black hole horizon in the equatorial plane of the Kerr-de Sitter space-times. | en |
| dc.identifier.doi | 10.1007/BF00758012 | |
| dc.identifier.wos | A1991FH80400001 | |