The Hubble constant from eight time-delay galaxy lenses. (arXiv:2007.14398v2 [astro-ph.CO] UPDATED)

<a href="http://arxiv.org/find/astro-ph/1/au:+Denzel_P/0/1/0/all/0/1">Philipp Denzel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Coles_J/0/1/0/all/0/1">Jonathan P. Coles</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Saha_P/0/1/0/all/0/1">Prasenjit Saha</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Williams_L/0/1/0/all/0/1">Liliya L. R. Williams</a>

We present a determination of the Hubble constant from the joint, free-form

analysis of 8 strongly, quadruply lensing systems. In the concordance

cosmology, we find $H_0 =

71.8^{+3.9}_{-3.3},mathrm{km},mathrm{s}^{-1},mathrm{Mpc}^{-1}$ with a

precision of $4.97%$. This is in agreement with the latest measurements from

Supernovae Type Ia and Planck observations of the cosmic microwave background.

Our precision is lower compared to these and other recent time-delay

cosmography determinations, because our modelling strategies reflect the

systematic uncertainties of lensing degeneracies. We furthermore are able to

find reasonable lensed image reconstructions by constraining to either value of

$H_0$ from local and early Universe measurements. This leads us to conclude

that current lensing constraints on $H_0$ are not strong enough to break the

“Hubble tension” problem of cosmology.

We present a determination of the Hubble constant from the joint, free-form

analysis of 8 strongly, quadruply lensing systems. In the concordance

cosmology, we find $H_0 =

71.8^{+3.9}_{-3.3},mathrm{km},mathrm{s}^{-1},mathrm{Mpc}^{-1}$ with a

precision of $4.97%$. This is in agreement with the latest measurements from

Supernovae Type Ia and Planck observations of the cosmic microwave background.

Our precision is lower compared to these and other recent time-delay

cosmography determinations, because our modelling strategies reflect the

systematic uncertainties of lensing degeneracies. We furthermore are able to

find reasonable lensed image reconstructions by constraining to either value of

$H_0$ from local and early Universe measurements. This leads us to conclude

that current lensing constraints on $H_0$ are not strong enough to break the

“Hubble tension” problem of cosmology.

http://arxiv.org/icons/sfx.gif