A New Estimate of the Hubble Time with Improved Modeling of Gravitational Lenses

Details A New Estimate of the Hubble Time with Improved Modeling of Gravitational Lenses A New Estimate of the Hubble Time with Improved Modeling of Gravitational Lenses

2008-02-21

arxiv.org/abs/0802.3219v1

Astronomy and Astrophysics

Astrophysics

24 pages, 9 figures. Accepted to ApJ

Scientific paper

10.1086/587635

This paper examines free-form modeling of gravitational lenses using Bayesian ensembles of pixelated mass maps. The priors and algorithms from previous work are clarified and significant technical improvements are made. Lens reconstruction and Hubble Time recovery are tested using mock data from simple analytic models and recent galaxy-formation simulations. Finally, using published data, the Hubble Time is inferred through the simultaneous reconstruction of eleven time-delay lenses. The result is H_0^{-1}=13.7^{+1.8}_{-1.0} Gyr.

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