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

Context. The precise determination of the present-day expansion rate of theUniverse, expressed through the Hubble constant $H_0$, is one of the mostpressing challenges in modern cosmology. Assuming flat $\Lambda$CDM, $H_0$inference at high redshift using cosmic-microwave-background data from Planckdisagrees at the 4.4$\sigma$ level with measurements based on the localdistance ladder made up of parallaxes, Cepheids and Type Ia supernovae (SNeIa), often referred to as "Hubble tension". Independent,cosmological-model-insensitive ways to infer $H_0$ are of critical importance.Aims. We apply an inverse-distance-ladder approach, combining strong-lensingtime-delay-distance measurements with SN Ia data. By themselves, SNe Ia aremerely good relative distance indicators, but by anchoring them to stronggravitational lenses one can obtain an $H_0$ measurement that is relativelyinsensitive to other cosmological parameters. Methods. A cosmological parameterestimate is performed for different cosmological background models, both forstrong-lensing data alone and for the combined lensing + SNe Ia data sets.Results. The cosmological-model dependence of strong-lensing $H_0$ measurementsis significantly mitigated through the inverse distance ladder. In combinationwith SN Ia data, the inferred $H_0$ consistently lies around 73-74 km s$^{-1}$Mpc$^{-1}$, regardless of the assumed cosmological background model. Ourresults agree nicely with those from the local distance ladder, but there is a>2$\sigma$ tension with Planck results, and a ~1.5$\sigma$ discrepancy withresults from an inverse distance ladder including Planck, Baryon AcousticOscillations and SNe Ia. Future strong-lensing distance measurements willreduce the uncertainties in $H_0$ from our inverse distance ladder.

The Hubble Constant determined through an inverse distance ladder including quasar time delays and Type Ia supernovae