Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-30900
Sereno, M (2009). Role of Λ in the cosmological lens equation. Physical Review Letters, 102(2):021301.
PDF (Accepted manuscript, Version 2)
PDF (Accepted manuscript, Version 1)
The cosmological constant Λ affects cosmological gravitational lensing. Effects due to Λ can be studied in the framework of the Schwarzschild–de Sitter spacetime. Two novel contributions, which cannot be accounted for by a proper use of angular diameter distances, are derived. First, a term δα̂Λ=2mbΛ/3 has to be added to the bending angle, where m is the lens mass and b the impact parameter. Second, Λ brings about a difference in the redshifts of multiple images. Both effects are quite small for real astrophysical systems, δα̂Λ≲1μarcsec and Δzs≲10-7.
|Other titles:||The role of Lambda in the cosmological lens equation|
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Institute of Theoretical Physics|
|Deposited On:||27 Feb 2010 14:23|
|Last Modified:||23 Nov 2012 14:29|
|Publisher:||American Physical Society|
|Funders:||Swiss NSF, Tomalla Foundation|
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