Pixel-level modelling of group-scale strong lens CASSOWARY 19

Abstract

We present the first high-precision model for the group-scale strong lensing system CASSOWARY 19 (CSWA19), utilising images from the Hubble Space Telescope (HST). Sixteen member galaxies identified via the red-sequence method, and the main halo, all modelled as the dual Pseudo Isothermal Elliptical profile (dPIE), are incorporated into a parametric lens model alongside an external shear field. To model the system, we adopt the PyAutoLens software package, employing a progressive search chain strategy for realizing the transition of source model from multiple Sérsic profiles to a brightness-adaptive pixelization, which uses 1000 pixels in the source plane to reconstruct the background source corresponding to 177,144 image pixels in the image plane. Our results indicate that the total mass within the Einstein radius is $M_{{\theta }_{\mathrm{E}}}$ $\approx 1.41\times 10^{13}$M${}_{\odot }$ and the average slope of the total mass density $\rho (r)\propto r^{-\gamma }$ is $\tilde{\gamma }=1.33$ within the effective radius. This slope is shallower than those measured in galaxies and groups but is closer to those of galaxy clusters. In addition, our approach successfully resolves the two merging galaxies in the background source and yields a total magnification of $\mu =103.18_{-0.19}^{+0.23}$, which is significantly higher than the outcomes from previous studies of CSWA19. In summary, our research demonstrates the effectiveness of the brightness-adaptive pixelization source reconstruction technique for modelling group-scale strong lensing systems. It can serve as a technical reference for future investigations into pixel-level modelling of the group- and cluster-scale strong lensing systems.

arXiv comment25 pages, 9 figures, 3 tables, accepted for publication in RAA; Updated references(which previously "in preparation")

References in corpus (89)

• Planck 2015 results. XIII. Cosmological parameters
• dynesty: A Dynamic Nested Sampling Package for Estimating Bayesian Posteriors and Evidences
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• A Catalog of Bulge+Disk Decompositions and Updated Photometry for 1.12 Million Galaxies in the Sloan Digital Sky Survey
• A New Method For Galaxy Cluster Detection I: The Algorithm
• A Bayesian approach to strong lensing modelling of galaxy clusters
• Direct Detection of CDM Substructure
• The Sloan Lens ACS Survey. X. Stellar, Dynamical, and Total Mass Correlations of Massive Early-type Galaxies
• Hubble Space Telescope Observations of the Lensing Cluster Abell 2218
• Dissecting the Gravitational Lens B1608+656. II. Precision Measurements of the Hubble Constant, Spatial Curvature, and the Dark Energy Equation of State
• Detection of lensing substructure using ALMA observations of the dusty galaxy SDP.81
• Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens
• Detection of a Dark Substructure through Gravitational Imaging
• Bayesian Strong Gravitational-Lens Modeling on Adaptive Grids: Objective Detection of Mass Substructure in Galaxies
• Combining Strong and Weak Gravitational Lensing in Abell 1689
• The Sloan Lens ACS Survey. IX. Colors, Lensing and Stellar Masses of Early-type Galaxies
• The Density Profiles of Massive, Relaxed Galaxy Clusters. II. Separating Luminous and Dark Matter in Cluster Cores
• Hubble Space Telescope Combined Strong and Weak Lensing Analysis of the CLASH Sample: Mass and Magnification Models and Systematic Uncertainties
• The Density Profiles of Massive, Relaxed Galaxy Clusters. I. The Total Density Over Three Decades in Radius
• 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
• The Quadruple Gravitational Lens PG1115+080: Time Delays and Models
• Semi-linear gravitational lens inversion
• The Halos of Satellite Galaxies: the Companion of the Massive Elliptical Lens SL2S J08544-0121
• CLASH-VLT: Insights on the mass substructures in the Frontier Fields Cluster MACS J0416.1-2403 through accurate strong lens modeling
• The Slope of the Cluster Elliptical Red Sequence: A Probe of Cluster Evolution
• An excess of small-scale gravitational lenses observed in galaxy clusters
• The CFHTLS-Strong Lensing Legacy Survey (SL2S): Investigating the group-scale lenses with the SARCS sample
• A Determination of H_0 with the CLASS Gravitational Lens B1608+656: III. A Significant Improvement in the Precision of the Time Delay Measurements
• Pseudo Elliptical Lensing Mass Model: Application to the NFW Mass Distribution
• What determines satellite galaxy disruption?
• An Atlas of MUSE Observations towards Twelve Massive Lensing Clusters
• Constraints on cosmological models from strong gravitational lensing systems
• Metallicity Gradient of a Lensed Face-on Spiral Galaxy at Redshift 1.49
• AutoLens: Automated Modeling of a Strong Lens's Light, Mass and Source
• Truncation of galaxy dark matter halos in high density environments
• The story of supernova 'Refsdal' told by MUSE
• The nature of giant clumps in distant galaxies probed by the anatomy of the Cosmic Snake
• Deja Vu All Over Again: The Reappearance of Supernova Refsdal
• The Sloan Lens ACS Survey. XIII. Discovery of 40 New Galaxy-Scale Strong Lenses
• The survival of dark matter halos in the cluster Cl0024+16
• The bulge-halo conspiracy in massive elliptical galaxies: implications for the stellar initial mass function and halo response to baryonic processes
• The CASSOWARY spectroscopy survey: A new sample of gravitationally lensed galaxies in SDSS
• The BOSS Emission-Line Lens Survey. IV. : Smooth Lens Models for the BELLS GALLERY Sample
• TDCOSMO. XII. Improved Hubble constant measurement from lensing time delays using spatially resolved stellar kinematics of the lens galaxy
• Adaptive Semi-linear Inversion of Strong Gravitational Lens Imaging
• COSMOGRAIL XIX: Time delays in 18 strongly lensed quasars from 15 years of optical monitoring
• Models of the Cosmic Horseshoe Gravitational Lens
• Strong lensing models of eight CLASH clusters from extensive spectroscopy: accurate total mass reconstructions in the cores
• PyAutoLens: Open-Source Strong Gravitational Lensing
• A Keck Survey of Gravitationally-Lensed Star-Forming Galaxies: High Spatial Resolution Studies of Kinematics and Metallicity Gradients
• Enhanced cluster lensing models with measured galaxy kinematics
• Star Formation at z=2.481 in the Lensed Galaxy SDSS J1110+6459: Star Formation down to 30 parsec scales
• Two New Large Separation Gravitational Lenses from SDSS
• The Grism Lens-Amplified Survey from Space (GLASS). II. Gas-phase metallicity and radial gradients in an interacting system at z~2
• The evolution of the red sequence slope in massive galaxy clusters
• Quantifying dwarf satellites through gravitational imaging: the case of SDSS J120602.09+514229.5
• Assessing the effect of lens mass model in cosmological application with updated galaxy-scale strong gravitational lensing sample
• Exploring the physical properties of lensed star-forming clumps at $2\lesssim z\lesssim 6$
• A Magnified View of the Kinematics and Morphology of RCSGA 032727-132609: Zooming in on a Merger at z=1.7
• The Magellan Evolution of Galaxies Spectroscopic and Ultraviolet Reference Atlas (MEGaSaURA) I: The Sample and the Spectra
• Probing the truncation of galaxy dark matter halos in high density environments from hydrodynamical N-body simulations
• A new high-precision strong lensing model of the galaxy cluster MACS J0416.1-2403
• The Sloan Bright Arcs Survey: Four Strongly Lensed Galaxies with Redshift >2
• Constraints on cosmological models from lens redshift data
• Cosmological model-independent constraints on spatial curvature from strong gravitational lensing and type Ia supernova observations
• Automated galaxy-galaxy strong lens modelling: no lens left behind
• MACS J0416.1-2403: Impact of line-of-sight structures on strong gravitational lensing modelling of galaxy clusters
• The Sloan Bright Arcs Survey : Six Strongly Lensed Galaxies at z=0.4-1.4
• The inner dark matter distribution of the Cosmic Horseshoe (J1148+1930) with gravitational lensing and dynamics
• Dust in the Wind: Composition and Kinematics of Galaxy Outflows at the Peak Epoch of Star Formation
• PyAutoFit: A Classy Probabilistic Programming Language for Model Composition and Fitting
• Star Formation at z=2.481 in the Lensed Galaxy SDSS J1110+6459, I: Lens Modeling and Source Reconstruction
• Systematic errors induced by the elliptical power-law model in galaxy-galaxy strong lens modeling
• The Cosmic Telescope that Lenses the Sunburst Arc, PSZ1 G311.65-18.48: Strong Gravitational Lensing model and Source Plane Analysis
• Analytical properties of the R^(1/m) luminosity law
• Unified lensing and kinematic analysis for any elliptical mass profile
• Constraining the multi-scale dark-matter distribution in CASSOWARY 31 with strong gravitational lensing and stellar dynamics
• Direct Estimate of the Post-Newtonian Parameter and Cosmic Curvature from Galaxy-scale Strong Gravitational Lensing
• An accurate analytic mass model for lensing galaxies
• Spectroscopy of CASSOWARY gravitationally-lensed galaxies in SDSS: characterisation of an extremely bright reionization-era analog at $z=1.42$
• MaNGA DynPop -- IV. Stacked total density profile of galaxy groups and clusters from combining dynamical models of integral-field stellar kinematics and galaxy-galaxy lensing
• A nuclear spiral in a dusty star-forming galaxy at $z=2.78$
• Mass Reconstruction of Galaxy-scale Strong Gravitational Lenses Using a Broken Power-law Model
• Lens Model and Source Reconstruction Reveal the Morphology and Star Formation Distribution in the Cool Spiral LIRG SGAS J143845.1$+$145407
• Cosmological application of the lens-redshift probability distribution with improved galaxy-scale gravitational lensing sample
• Strong-lensing and kinematic analysis of CASSOWARY 31: can strong lensing constrain the masses of multi-plane lenses?
• A compact group lens modeled with GIGA-Lens: Enhanced inference for complex systems

Cited by in corpus (2)

• Source REconstruction of Arcs behind Cluster Halos (SourceREACH): A New Source Reconstruction Algorithm Optimized for Giant Arcs and Galaxy Cluster Lenses
• Strong Lensing Model and Dust Extinction Maps of the Host Galaxy of Type Ia Supernova H0pe