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A Catalog of Mass Models for Gravitational Lensing
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Many different families of mass models are used in modern applications of strong gravitational lensing. I review a wide range of popular models, with two points of emphasis: (1) a discussion of strategies for building models suited to a particular lensing problem; and (2) a summary of technical results for a canonical set of models. All of the models reviewed here are included in publicly-available lensing software called gravlens.
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Cited by 14 Pith papers
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Gaussian processes on ray-guided transformed uniform grids for fast, flexible, and auto-differentiable adaptive source reconstruction in lens modelling
A new RTU grid method models the lensing source as a Gaussian process on a ray-transformed uniform grid, achieving comparable fits with roughly half the pixels per dimension and higher ELBOs on mock data.
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The overconcentrated dark halo in the strong lens SDSS J0946+1006 is a subhalo: evidence for self interacting dark matter?
The dark matter clump in lens J0946+1006 is a subhalo at z=0.207 with a steep density profile, a >5 sigma outlier from LCDM expectations, possibly pointing to self-interacting dark matter.
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Mining for Dark Matter Substructure: Inferring subhalo population properties from strong lenses with machine learning
A neural likelihood ratio estimator trained on simulated strong lensing images can infer the abundance and mass slope of dark matter subhalos from an ensemble of lenses.
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ATLAS. II. Extremely High Incidence of Balmer Line Absorption with Predominant Blueshifts in LRDs: Statistical Insights through Comparison with Type 1 AGNs
Balmer-line absorption occurs in ~35% (14/40) of JWST little-red-dot AGNs, roughly 850x the rate in SDSS type-1 AGNs, with mostly slow blueshifted absorber velocities.
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Lambda as a Probe of Lensing Consistency
Spatially resolved λ(r) from the mass-sheet degeneracy quantifies the radial transition in reliability between strong and weak lensing mass reconstructions of galaxy clusters.
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VENUS: A Strongly Lensed Clumpy Galaxy at $z\sim11-12$ behind the Galaxy Cluster MACS J0257.1-2325
A strongly lensed galaxy at z~11-12 is resolved into ~10-70 pc star-forming clumps that dominate its stellar mass, indicating clumpy, cluster-like star formation in the early Universe.
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Analyzing Line-of-sight selection biases in galaxy-scale strong lensing with external convergence and shear
A hybrid simulation method predicts line-of-sight convergence and shear distributions for strong lenses, showing that neglecting them biases inferred Hubble constant values by up to about one percent.
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Reconciling concentration to virial mass relations
The offset between lensing-based and simulated concentration-mass relations can be largely reconciled by adopting more flexible dark matter profiles and more extreme stellar initial mass functions.
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Speeding up Gravitational Lens Mass Models with Machine Learning: Applications in X-ray Astronomy
A fully connected network trained on millions of simulated quads predicts SIE lens mass and ellipticity from four image positions, cutting optimisation time for real and simulated quadruply lensed quasars to minutes.
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Disentangling the dark and stellar mass through precise lens modelling of the JWST observation of lensed quasar WFI2033--4723
Composite time-delay lens modelling of JWST WFI2033–4723 yields intermediate stellar IMF normalisation and a steep gNFW inner slope γ_in≃1.3 that is robust to the choice of external cosmology.
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Varstrometry for Off-nucleus and Dual Subkiloparsec AGN (VODKA): Three Quadruply Lensed Quasars at Cosmic Noon in HST and JWST
Three quadruply lensed quasars at z≈1.5–3.0 have lens galaxies with Einstein radii 0.44–0.58 arcsec and photometrically constrained redshifts 0.4–1.5, placing them among the smallest-separation, highest-redshift galax...
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Accelerated inference of microlensed gravitational waves with machine learning
A neural posterior estimator trained on wave-optics-microlensed gravitational-wave signals recovers source and lens parameters and Bayes factors consistent with Bilby, about 10 times faster.
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Model-independent and model-based local lensing properties of B0128+437 from resolved quasar images
Local convergence ratios and reduced shears for B0128+437, derived model-independently at image and subcomponent scales, indicate that elliptical lens models are too simple for this system when milliarcsecond substruc...
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A new $H_0$ measurement with SNe Requiem and Encore using $\texttt{Gravity.jl}$
New H0 = 67.0 +9.3/-7.8 km/s/Mpc from joint lens-model fit to time delays of SN Requiem and SN Encore in MACS J0138.0-2155.
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