2008MNRAS.388.1279I


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST09:25:18

2008MNRAS.388.1279I - Mon. Not. R. Astron. Soc., 388, 1279-1283 (2008/August-2)

A new independent limit on the cosmological constant/dark energy from the relativistic bending of light by Galaxies and clusters of Galaxies.

ISHAK M., RINDLER W., DOSSETT J., MOLDENHAUER J. and ALLISON C.

Abstract (from CDS):

We derive new limits on the value of the cosmological constant, Λ, based on the Einstein bending of light by systems where the lens is a distant galaxy or a cluster of galaxies. We use an amended lens equation in which the contribution of Λ to the Einstein deflection angle is taken into account and use observations of Einstein radii around several lens systems. We use in our calculations a Schwarzschild-de Sitter vacuole exactly matched into a Friedmann-Robertson-Walker background and show that a Λ-contribution term appears in the deflection angle within the lens equation. We find that the contribution of the Λ-term to the bending angle is larger than the second-order term for many lens systems. Using these observations of bending angles, we derive new limits on the value of Λ. These limits constitute the best observational upper bound on Λ after cosmological constraints and are only two orders of magnitude away from the value determined by those cosmological constraints.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): gravitation - gravitational lensing - cosmology: theory

Status at CDS:  

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 565 0
2 ClG J1004+4112 ClG 10 04 34.180 +41 12 43.50           ~ 38 3
3 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1017 0
4 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 892 5
5 ACO S 1077 ClG 22 58 52.34 -34 46 54.6           ~ 179 0
6 [CMM2005] A2219 B LeG ~ ~   22.56 22.38     ~ 4 0

    Equat.    Gal    SGal    Ecl

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2020.05.27-09:25:18

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