The Einstein Ring 0047-2808 Revisited: A Bayesian Inversion

Abstract

In a previous paper, we outlined a new Bayesian method for inferring the properties of extended gravitational lenses, given data in the form of resolved images. This method holds the most promise for optimally extracting information from the observed image, whilst providing reliable uncertainties in all parameters. Here, we apply the method to the well studied optical Einstein ring 0047-2808. Our results are in broad agreement with previous studies, showing that the density profile of the lensing galaxy is aligned within a few degrees of the light profile, and suggesting that the source galaxy (at redshift 3.6) is a binary system, although its size is only of order 1-2 kpc. We also find that the mass of the elliptical lensing galaxy enclosed by the image is (2.91$\pm$0.01)$\times 10^{11}$ M$_{\sun}$. Our method is able to achieve improved resolution for the source reconstructions, although we also find that some of the uncertainties are greater than has been found in previous analyses, due to the inclusion of extra pixels and a more general lens model.

Accepted for publication in ApJ

References in corpus (17)

• The Sloan Lens ACS Survey. I. A Large Spectroscopically Selected Sample of Massive Early-Type Lens Galaxies
• A Bayesian analysis of regularised source inversions in gravitational lensing
• The Structure and Dynamics of Luminous and Dark Matter in the Early-Type Lens Galaxy of 0047-281 at z=0.485
• Semi-linear gravitational lens inversion
• Fast calculation of a family of elliptical mass gravitational lens models
• The Importance of Einstein Rings
• A quadruply imaged quasar with an optical Einstein ring candidate: 1RXS J113155.4-123155
• Decomposition of the visible and dark matter in the Einstein ring 0047-2808 by semi-linear inversion
• The Redshift of the Lensed Object in the Einstein Ring B0218+357
• Taking Bigger Metropolis Steps by Dragging Fast Variables
• A Molecular Einstein Ring: Imaging a Starburst Disk Surrounding a Quasi-Stellar Object
• Strong Gravitational Lens Inversion: A Bayesian Approach
• Discovery of a high-redshift Einstein ring
• Redshift of the Einstein Ring in MG1549+305
• The lens and source of the optical Einstein ring gravitational lens ER 0047-2808
• When Darwin Met Einstein: Gravitational Lens Inversion with Genetic Algorithms
• Spectroscopy of the optical Einstein ring 0047-2808

Cited by in corpus (13)

• Time Delay Cosmography
• The Sloan Lens ACS Survey. VII. Elliptical Galaxy Scaling Laws from Direct Observational Mass Measurements
• Unveiling dark halos in lensing galaxies
• A Molecular Einstein Ring at z=4.12: Imaging the Dynamics of a Quasar Host Galaxy Through a Cosmic Lens
• A Unifying Framework for Self-consistent Gravitational Lensing and Stellar Dynamics Analyses of Early-Type Galaxies
• SLITronomy: towards a fully wavelet-based strong lensing inversion technique
• Bayesian Inference from Observations of Solar-Like Oscillations
• Galaxy-lens determination of $H_0$: the effect of the ellipse+shear modeling assumption
• Unlensing HST Observations of the Einstein Ring 1RXS J1131-1231: A Bayesian Analysis
• Lessons from a blind study of simulated lenses: image reconstructions do not always reproduce true convergence
• Resolving star-forming clumps in a z $\sim$ 2 lensed galaxy: a pixelated Bayesian approach
• Biases in inferring dark matter profiles from dynamical and lensing measurements
• Applications of Bayesian Probability Theory in Astrophysics