paper

Cosmological Constraints from the double source plane lens SDSSJ0946+1006

arXiv:1403.5278 · doi:10.1093/mnras/stu1190

Abstract

We present constraints on the equation of state of dark energy, , and the total matter density, , derived from the double-source-plane strong lens SDSSJ0946+1006, the first cosmological measurement with a galaxy-scale double-source-plane lens. By modelling the primary lens with an elliptical power-law mass distribution, and including perturbative lensing by the first source, we are able to constrain the cosmological scaling factor in this system to be , which implies for a flat cold dark matter (CDM) cosmology. Combining with a cosmic microwave background prior from Planck, we find = assuming a flat CDM cosmology. This inference shifts the posterior by 1 and improves the precision by 30 per cent with respect to Planck alone, and demonstrates the utility of combining simple, galaxy-scale multiple-source-plane lenses with other cosmological probes to improve precision and test for residual systematic biases.

9 Pages, 7 Figures. Updated version as published in MNRAS

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