A Mass Model for the Lensing Cluster SDSS J1004+4112: Constraints from the Third Time Delay

Bibcode
2022ApJ...937...35F
DOI
10.3847/1538-4357/ac8c40
Forés-Toribio, R.; Muñoz, J. A.; Kochanek, C. S.; Mediavilla, E.
Bibliographical reference

The Astrophysical Journal

Advertised on:
9
2022
Journal
The Astrophysical Journal
Number of authors
4
IAC number of authors
1
Citations
15
Refereed citations
13
Description
We have built a new model for the lens system SDSS J1004+4112 including the recently measured time delay of the fourth quasar image. This time delay has a strong influence on the inner mass distribution of the lensing cluster (ρ ∝ r -α ) allowing us to determine $\alpha ={1.18}_{-0.03(-0.18)}^{+0.02(+0.11)}$ at the 68% (95%) confidence level in agreement with hydrodynamical simulations of massive galaxy clusters. We find an offset between the brightest cluster galaxy and the dark matter halo of ${3.8}_{-0.7(-1.3)}^{+0.6(+1.4)}$ kpc at 68% (95%) confidence which is compatible with other galaxy cluster measurements. As an observational challenge, the estimated time delay between the leading image C and the faint (I = 24.7) fifth image E is roughly 8 yr.
Related projects
Project Image
Relativistic and Theoretical Astrophysics
Introduction Gravitational lenses are a powerful tool for Astrophysics and Cosmology. The goals of this project are: i) to obtain a robust determination of the Hubble constant from the time delay measured between the images of a lensed quasar; ii) to study the individual and statistical properties of dark matter condensations in lens galaxies from
Evencio
Mediavilla Gradolph
In progress
Type
Refereed
Cosmology & Astroparticles (CYA, CTA)
Gravitational lensing
Strong gravitational lensing
Galaxy clusters
Dark matter distribution
Quasars

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