Issue |
A&A
Volume 682, February 2024
|
|
---|---|---|
Article Number | A187 | |
Number of page(s) | 7 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361/202348066 | |
Published online | 27 February 2024 |
Parameter-free Hubble constant from the quadruply lensed quasar SDSS J1004+4112
1
Universidad de Cantabria, Avda. de Los Castros 48, 39005 Santander, Spain
e-mail: josebamartinez2@gmail.com
2
Instituto de Física de Cantabria (CSIC-UC), Avda. Los Castros s/n, 39005 Santander, Spain
Received:
25
September
2023
Accepted:
4
December
2023
We present a free-form lens model for the multiply lensed quasar in the galaxy cluster SDSS J1004+4112. Our lens model draws minimal assumptions on the distribution of mass in the lens plane. We have paid particular attention to the model uncertainties on the predicted time delay originating from the particular configuration of model variables. Taking into account this uncertainty, we obtained a value of the Hubble constant of H0 = 74−13+9 km s−1 Mpc−1, which is consistent with recent independent estimates. The predicted time delay between the central image E and image C (the first to arrive) is ΔTE−C = 3200 ± 200 days for the estimated Hubble constant. Future measurements of ΔTE−C will allow for a tighter constraint to be imposed on H0 in this cluster-QSO system.
Key words: gravitation / gravitational lensing: strong / methods: statistical / galaxies: clusters: individual: SDSS J1004+4112 / cosmological parameters / cosmology: theory
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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