# The Hubble constant from eight time-delay galaxy lenses

@article{Denzel2020TheHC, title={The Hubble constant from eight time-delay galaxy lenses}, author={Philipp Denzel and Jonathan P. Coles and Prasenjit Saha and Liliya L. R. Williams}, journal={Monthly Notices of the Royal Astronomical Society}, year={2020} }

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…

## Figures and Tables from this paper

## 20 Citations

### Constraints on interacting dark energy model from lensed quasars: Relieving the H0 tension from 5.3σ to 1.7σ

- Physics
- 2021

Measurements for strong gravitational lensing time delays between multiple images of background quasars can provide an independent probe to explore the expansion history of the late-time universe. In…

### Early dark energy by dark Higgs, and axion-induced non-thermal trapping

- Physics
- 2022

. We propose a new scenario of early dark energy (EDE) with a dark Higgs trapped at the origin. To keep this dark Higgs trapped until around the matter-radiation equality, we use dark photons…

### Exact Solutions of Cosmological Equations in Legendre Elliptic Integrals

- MathematicsGravitation and Cosmology
- 2022

### Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

- PhysicsJournal of High Energy Astrophysics
- 2022

### Measuring the sound horizon and absolute magnitude of SNIa by maximizing the consistency between low-redshift data sets

- PhysicsPhysical Review D
- 2022

The comoving sound horizon at the baryon drag epoch, rd, encapsulates very important physical information about the pre-recombination era and serves as a cosmic standard ruler. On the other hand, the…

### Neural network reconstruction of late-time cosmology and null tests

- Computer ScienceJournal of Cosmology and Astroparticle Physics
- 2022

This work explores the possibility of using artificial neural networks (ANN) to reconstruct late-time expansion and large scale structure cosmological parameters and shows how mock data can be used to design an optimal ANN for both parameters.

### Imprint of early dark energy in stochastic gravitational wave background

- PhysicsPhysical Review D
- 2022

Gravitational waves (GWs) search technologies [1–5] have strong ongoing research interest. Implications from these developments focus not only on discovering new astrophysical objects [6, 7], but…

### Model-independent Estimation of H 0 and Ω K from Strongly Lensed Fast Radio Bursts

- Physics
- 2021

Model-independent estimation of H 0 and Ω K can provide clues about the origin of the intractable Hubble constant tension and the current cosmic-curvature crisis. Strongly lensed fast radio bursts…

### Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2021

Recent studies by Solà Peracaula, Gómez-Valent, de Cruz Pérez and Moreno-Pulido (2019,2020) have pointed out the intriguing possibility that Brans-Dicke cosmology with constant vacuum energy density…

### Cosmological Constraints from Galaxy Cluster Sparsity, Cluster Gas Mass Fraction, and Baryon Acoustic Oscillation Data

- PhysicsThe Astrophysical Journal
- 2021

In recent years, the availability of large, complete cluster samples has enabled numerous cosmological parameter inference analyses using cluster number counts. These have provided constraints on the…

## References

SHOWING 1-10 OF 134 REFERENCES

### TDCOSMO IV: Hierarchical time-delay cosmography -- joint inference of the Hubble constant and galaxy density profiles

- Physics
- 2020

The H0LiCOW collaboration inferred via gravitational lensing time delays a Hubble constant $H_0=73.3^{+1.7}_{-1.8}$ km s$^{-1}{\rm Mpc}^{-1}$, describing deflector mass density profiles by either a…

### Galaxy-lens determination of H0: constraining density slope in the context of the mass sheet degeneracy

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2020

Gravitational lensing offers a competitive method to measure H0 with the goal of 1% precision. A major obstacle comes in the form of lensing degeneracies, such as the mass sheet degeneracy (MSD),…

### COSMOGRAIL XIX: Time delays in 18 strongly lensed quasars from 15 years of optical monitoring

- Physics
- 2020

We present the results of 15 years of monitoring of lensed quasars conducted by the COSMOGRAIL program at the Leonhard Euler 1.2m Swiss Telescope. The decade-long light curves of 23 lensed QSOs are…

### Time Delay Lens Modeling Challenge: I. Experimental Design

- Computer Science, Physics
- 2018

The goal of this challenge is to assess the present capabilities of lens modeling codes and assumptions and test the level of accuracy of inferred cosmological parameters given realistic mock datasets, and to model a set of simulated HST observations of 50 mock lens systems.

### TDCOSMO: II. Six new time delays in lensed quasars from high-cadence monitoring at the MPIA 2.2 m telescope

- Physics
- 2020

We present six new time-delay measurements obtained from $R_c$-band monitoring data acquired at the MPIA 2.2m telescope at La Silla observatory between October 2016 and February 2020. The lensed…

### Robust modeling of quadruply lensed quasars (and random quartets) using Witt's hyperbola

- Physics
- 2018

We develop a robust method to model quadruply lensed quasars, relying heavily on the work of Witt (1996), who showed that for elliptical potentials, the four image positions, the source, and the…

### The Standard Model of Cosmology: A Skeptic's Guide

- Physics
- 2018

The status of the standard cosmological model, also known as "LCDM" is described. With some simple assumptions, this model fits a wide range of data, with just six (or seven) free parameters. One…

### Time Delay Lens modelling Challenge: II. Results

- Computer Science
- 2020

This time delay lens modelling challenge aims to assess the level of precision and accuracy of the modelling techniques that are currently fast enough to handle of order 50 lenses, via the blind analysis of simulated datasets presented in paper I.

### Measuring H$_0$ with CLASS B1608+656 : The Second Season of VLA Monitoring

- Physics
- 1999

The four-component gravitational lens CLASS B1608+656 has been monitored with the VLA for two seasons in order to search for time delays between the components. These time delays can be combined with…

### The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

- PhysicsThe Open Journal of Astrophysics
- 2021

It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance…