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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study the substructure content of the strong gravitational lensRXJ1131-1231 through a forward modelling approach that relies on generating anextensive suite of realistic simulations. We use a semi-analytic merger treeprescription that allows us to stochastically generate substructure populationswhose properties depend on the dark matter particle mass. These synthetic halosare then used as lenses to produce realistic mock images that have the samefeatures, e.g. luminous arcs, quasar positions, instrumental noise and PSF, asthe data. We then analyse the data and the simulations in the same way withsummary statistics that are sensitive to the signal being targeted and are ableto constrain models of dark matter statistically using Approximate BayesianComputing (ABC) techniques. In this work, we focus on the thermal relic massestimate and fix the semi-analytic descriptions of the substructure evolutionbased on recent literature. We are able, based on the HST data forRXJ1131-1231, to rule out a warm dark matter thermal relic mass below 2 keV atthe 2$\sigma$ confidence level.

Lensing substructure quantification in RXJ1131-1231: A 2 keV lower bound on dark matter thermal relic mass