SHARP - IV. An apparent flux ratio anomaly resolved by the edge-on disc in B0712+472

Abstract

Flux ratio anomalies in quasar lenses can be attributed to dark matter substructure surrounding the lensing galaxy and, thus, used to constrain the substructure mass fraction. Previous applications of this approach infer a substructure abundance that potentially in tension with the predictions of a $\Lambda$CDM cosmology. However, the assumption that all flux ratio anomalies are due to substructure is a strong one, and alternative explanations have not been fully investigated. Here, we use new high-resolution near-IR Keck~II adaptive optics imaging for the lens system CLASS B0712+472 to perform pixel-based lens modelling for this system and, in combination with new VLBA radio observations, show that the inclusion of the disc in the lens model can explain the flux ratio anomalies without the need for dark matter substructures. The projected disc mass comprises 16% of the total lensing mass within the Einstein radius and the total disc mass is $1.79\times 10^{10}{M}_{sun}$. The case of B0712+472 adds to the evidence that not all flux ratio anomalies are due to dark subhaloes, and highlights the importance of taking the effects of baryonic structures more fully into account in order to obtain an accurate measure of the substructure mass fraction.

9 pages, 5 figures, 5 tables. Accepted by MNRAS

References in corpus (15)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• Beasts of the Southern Wild: Discovery of nine Ultra Faint satellites in the vicinity of the Magellanic Clouds
• Bayesian Strong Gravitational-Lens Modeling on Adaptive Grids: Objective Detection of Mass Substructure in Galaxies
• Inference of the Cold Dark Matter substructure mass function at z=0.2 using strong gravitational lenses
• How well can cold-dark-matter substructures account for the observed radio flux-ratio anomalies?
• High resolution imaging of the anomalous flux-ratio gravitational lens system CLASS B2045+265: Dark or luminous satellites?
• The effect of a disc on the population of cuspy and cored dark matter substructures in Milky Way-like galaxies
• Radio, optical and infrared observations of CLASS B0128+437
• The stability of stellar disks in Milky-Way sized dark matter halos
• Strong lensing signatures of luminous structure and substructure in early-type galaxies
• Red nuggets grow inside-out: evidence from gravitational lensing
• Free-free absorption in the gravitational lens JVAS B0218+357
• Radio Monitoring Campaigns of Six Strongly Lensed Quasars
• Gravitational microlensing of AGN dusty tori

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