English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present a new approach to gravitational lens massmap reconstruction. Ourmassmap solutions perfectly reproduce the positions, fluxes, and shears of allmultiple images. And each massmap accurately recovers the underlying massdistribution to a resolution limited by the number of multiple images detected.We demonstrate our technique given a mock galaxy cluster similar to Abell 1689which gravitationally lenses 19 mock background galaxies to produce 93 multipleimages. We also explore cases in which far fewer multiple images are observed,such as four multiple images of a single galaxy. Massmap solutions are neverunique, and our method makes it possible to explore an extremely flexible rangeof physical (and unphysical) solutions, all of which perfectly reproduce thedata given. Each reconfiguration of the source galaxies produces a new massmapsolution. An optimization routine is provided to find those source positions(and redshifts, within uncertainties) which produce the "most physical" massmapsolution, according to a new figure of merit developed here. Our method imposesno assumptions about the slope of the radial profile nor mass following light.But unlike "non-parametric" grid-based methods, the number of free parameterswe solve for is only as many as the number of observable constraints (orslightly greater if fluxes are constrained). For each set of source positionsand redshifts, massmap solutions are obtained "instantly" via direct matrixinversion by smoothly interpolating the deflection field using a recentlydeveloped mathematical technique. Our LensPerfect software is straightforwardand easy to use and is made publicly available via our website.

LensPerfect: Gravitational Lens Massmap Reconstructions Yielding Exact Reproduction of All Multiple Images