The Impact of $\text{CLEAN}$ing on Strong Gravitational Lens Modelling

Abstract

We present a comparison of image and uv-plane galaxy-galaxy strong lensing modelling results for simulated ALMA observations with different antenna configurations and on-source integration times. Image-plane modelling is carried out via use of the $\text{CLEAN}$ algorithm, and we explore the effects of different visibility weighting schemes on the inferred lens model parameters. We find that direct modelling of the visibility data consistently outperforms image-plane modelling for both the naturally and Briggs-weighted images. We also find that the modelling of images created with Briggs weighting generally produces more accurate results than those obtained by modelling images constructed with natural weighting. We explain this by quantifying the suppression of information due to $\text{CLEAN}$ing on scales at which the modelling is sensitive, and how this differs between Briggs and natural weighting. At higher resolutions, the differences between the lens modelling techniques are much less pronounced and overall, modelling errors are significantly reduced. We also find that time-binning the visibilities by up to a factor of three makes no significant difference to the inferred lens parameters when directly modelling in the uv-plane. This work provides some guidance on navigating the many choices faced when modelling strong lens interferometric imaging data.

arXiv comment18 pages, 22 figures

References in corpus (43)

• Planck 2015 results. XIII. Cosmological parameters
• dynesty: A Dynamic Nested Sampling Package for Estimating Bayesian Posteriors and Evidences
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Detection of lensing substructure using ALMA observations of the dusty galaxy SDP.81
• Warm dark matter chills out: constraints on the halo mass function and the free-streaming length of dark matter with 8 quadruple-image strong gravitational lenses
• A Bayesian analysis of regularised source inversions in gravitational lensing
• Semi-linear gravitational lens inversion
• The SL2S Galaxy-scale Lens Sample. IV. The dependence of the total mass density profile of early-type galaxies on redshift, stellar mass, and size
• A dynamically cold disk galaxy in the early Universe
• A precise extragalactic test of General Relativity
• Cosmological Constraints from the double source plane lens SDSSJ0946+1006
• Dark matter halos of massive elliptical galaxies at $z\sim 0.2$ are well described by the Navarro-Frenk-White profile
• AutoLens: Automated Modeling of a Strong Lens's Light, Mass and Source
• The Co-Evolution of Total Density Profiles and Central Dark Matter Fractions in Simulated Early-Type Galaxies
• Lensing substructure quantification in RXJ1131-1231: A 2 keV lower bound on dark matter thermal relic mass
• z~2-9 Galaxies Magnified by the Hubble Frontier Field Clusters II: Luminosity Functions and Constraints on a Faint-End Turnover
• HerMES: ALMA Imaging of Herschel-selected Dusty Star-forming Galaxies
• Revealing the complex nature of the strong gravitationally lensed system H-ATLAS J090311.6+003906 using ALMA
• Constraining sterile neutrino cosmologies with strong gravitational lensing observations at redshift z~0.2
• Strong lensing time-delay cosmography in the 2020s
• The Reionization Lensing Cluster Survey (RELICS) and the Brightest High-z Galaxies
• PyAutoLens: Open-Source Strong Gravitational Lensing
• ALMA maps the Star-Forming Regions in a Dense Gas Disk at z~3
• ALMA imaging of SDP.81 - II. A pixelated reconstruction of the CO emission lines
• Cosmography from two-image lens systems: overcoming the lens profile slope degeneracy
• Herschel-ATLAS: Modelling the first strong gravitational lenses
• Automated galaxy-galaxy strong lens modelling: no lens left behind
• Modelling high resolution ALMA observations of strongly lensed highly star forming galaxies detected by Herschel
• A novel approach to visibility-space modelling of interferometric gravitational lens observations at high angular resolution
• The first simultaneous measurement of Hubble constant and post-Newtonian parameter from Time-Delay Strong Lensing
• ALMA Lensing Cluster Survey: ALMA-Herschel Joint Study of Lensed Dusty Star-Forming Galaxies across $z\simeq 0.5-6$
• A Triple Rollover: A third multiply-imaged source at z~6 behind the Jackpot gravitational lens
• Close-up view of a luminous star-forming galaxy at z=2.95
• Early-type galaxy density profiles from IllustrisTNG: II. Evolutionary trend of the total density profile
• Beyond the bulge-halo conspiracy? Density profiles of Early-type galaxies from extended-source strong lensing
• A High-Resolution Investigation of the Multi-Phase ISM in a Galaxy during the First Two Billion Years
• Testing strong lensing subhalo detection with a cosmological simulation
• A magnified view of circumnuclear star formation and feedback around an AGN at z=2.6
• The impact of line-of-sight structures on measuring $H_0$ with strong lensing time-delays
• SEAGLE--II: Constraints on feedback models in galaxy formation from massive early type strong lens galaxies
• Time-Delay Cosmography: Measuring the Hubble Constant and other cosmological parameters with strong gravitational lensing
• Modelling high-resolution ALMA observations of strongly lensed dustystar forming galaxies detected by Herschel
• Probing General Relativity in galactic scales at z $\sim 0.3$

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