The role of Lambda in the cosmological lens equation
| dc.creator | Sereno, M. | |
| dc.date | 2008-07-31 | |
| dc.date | 2008-10-30 | |
| dc.date.accessioned | 2026-07-07T12:44:43Z | |
| dc.date.available | 2026-07-07T12:44:43Z | |
| dc.description | The cosmological constant Lambda affects cosmological gravitational lensing. Effects due to Lambda can be studied in the framework of the Schwarzschild-de Sitter spacetime. Two novel contributions, which can not be accounted for by a proper use of angular diameter distances, are derived. First, a term 2m b Lambda/3 has to be added to the bending angle, where "m" is the lens mass and "b" the impact parameter. Second, Lambda brings about a difference in the redshifts of multiple images. Both effects are quite small for real astrophysical systems (contribution to the bending < 0.1 microarcsec and difference in redshift < 10^{-7}). | |
| dc.description | 4 pages. (Univ. Zuerich); v2: presentation improved, discussion extended, references to papers posted after the v1-version added. In press on Phys. Rev. Lett | |
| dc.identifier | https://arxiv.org/abs/0807.5123 | |
| dc.identifier | http://arxiv.org/abs/0807.5123 | |
| dc.identifier | Phys.Rev.Lett.102:021301,2009 | |
| dc.identifier | doi:10.1103/PhysRevLett.102.021301 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/220868 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | The role of Lambda in the cosmological lens equation | |
| dc.type | text |