Cosmological constraints from the double source plane lens SDSSJ0946+1006

Collett, Thomas E.; Auger, Matthew W.

doi:10.1093/mnras/stu1190

Cited by 119 publications

(120 citation statements)

References 41 publications

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“…For instance, for lensed time-varying sources such as galaxies that contain quasars, the different appearances of the source may have differing times-of-flight and this information can be used (Refsdal 1964;Blandford & Narayan 1992) to extract the expansion history between source, lens, and observer (Schechter et al 1997;Suyu et al 2013Suyu et al , 2017Birrer et al 2016;Bonvin et al 2017). Lens systems with multiple sources at differing redshifts can provide (Link & Pierce 1998;Gavazzi et al 2008;Jullo et al 2010;Collett & Auger 2014) complementary information (Collett et al 2012) about the expansion history, independent of the Hubble constant.…”

Section: Introductionmentioning

confidence: 99%

The DES Bright Arcs Survey: Hundreds of Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey Science Verification and Year 1 Observations

Diehl¹,

Buckley-Geer²,

Lindgren³

et al. 2017

ApJS

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We report the results of searches for strong gravitational lens systems in the Dark Energy Survey (DES) Science Verification and Year 1 observations. The Science Verification data span approximately 250 sq. deg. with a median i-band limiting magnitude for extended objects (10σ) of 23.0. The Year 1 data span approximately 2000 sq. deg. and have an i-band limiting magnitude for extended objects (10σ) of 22.9. As these data sets are both wide and deep, they are particularly useful for identifying strong gravitational lens candidates. Potential strong gravitational lens candidate systems were initially identified based on a color and magnitude selection in the DES The Astrophysical Journal Supplement Series, 232:15 (28pp), 2017 September https://doi.org/10.3847/1538-4365/aa8667 © 2017. The American Astronomical Society. All rights reserved.1 object catalogs or because the system is at the location of a previously identified galaxy cluster. Cutout images of potential candidates were then visually scanned using an object viewer and numerically ranked according to whether or not we judged them to be likely strong gravitational lens systems. Having scanned nearly 400,000 cutouts, we present 374 candidate strong lens systems, of which 348 are identified for the first time. We provide the R.A. and decl., the magnitudes and photometric properties of the lens and source objects, and the distance (radius) of the source(s) from the lens center for each system.

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Section: Introductionmentioning

confidence: 99%

The DES Bright Arcs Survey: Hundreds of Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey Science Verification and Year 1 Observations

Diehl¹,

Buckley-Geer²,

Lindgren³

et al. 2017

ApJS

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“…We use an adaptive 50 by 50 grid of square pixels as detailed in Collett & Auger (2014) in order to avoid artificially breaking the mass-sheet degeneracy (Falco et al 1985). We use curvature-regularized sources as favored by the analysis of Suyu et al (2006); the regularization encodes the prior that astrophysical sources are reasonably smooth.…”

Section: Lens Modeling Of the Lensed Arcs And Central Imagementioning

confidence: 99%

Core or Cusps: The Central Dark Matter Profile of a Strong Lensing Cluster with a Bright Central Image at Redshift 1

Collett

Buckley-Geer

Lin

et al. 2017

ApJ

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We report on SPT-CLJ2011-5228, a giant system of arcs created by a cluster at z = 1.06. The arc system is notable for the presence of a bright central image. The source is a Lyman break galaxy at z s = 2.39 and the mass enclosed within the Einstein ring of radius 14 arcsec is~ M 10 14.2 . We perform a full reconstruction of the light profile of the lensed images to precisely infer the parameters of the mass distribution. The brightness of the central image demands that the central total density profile of the lens be shallow. By fitting the dark matter as a generalized Navarro-Frenk-White profile-with a free parameter for the inner density slope-we find that the break radius is -+ 7648 kpc, and that the inner density falls with radius to the power −0.38±0.04 at 68% confidence. Such a shallow profile is in strong tension with our understanding of relaxed cold dark matter halos; dark matter-only 1 simulations predict that the inner density should fall as -r 1 . The tension can be alleviated if this cluster is in fact a merger; a two-halo model can also reconstruct the data, with both clumps (density varying as -r 0.8 and -r 1.0 ) much more consistent with predictions from dark matter-only simulations. At the resolution of our Dark Energy Survey imaging, we are unable to choose between these two models, but we make predictions for forthcoming Hubble Space Telescope imaging that will decisively distinguish between them.

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“…In addition, such double source plane (DSP) lens systems can be a useful, complementary cosmological probe (e.g., Collett et al 2012;Collett & Auger 2014;Linder 2016), provided the mass-sheet degeneracy is broken (e.g., Falco et al 1985;Schneider 2014). However, DSP lenses are extremely rare.…”

Section: Introductionmentioning

confidence: 99%

A Spectroscopically Confirmed Double Source Plane Lens System in the Hyper Suprime-Cam Subaru Strategic Program

Tanaka

Wong

et al. 2016

ApJL

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We report the serendipitous discovery of HSC J142449−005322, a double source plane lens system in the Hyper Suprime-Cam Subaru Strategic Program. We dub the system Eye of Horus. The lens galaxy is a very massive early-type galaxy with stellar mass of~´ M 7 10 11 located at = z 0.795The system exhibits two arcs/rings with clearly different colors, including several knots. We have performed spectroscopic follow-up observations of the system with FIRE on Magellan. The outer ring is confirmed atwith multiple emission lines, while the inner arc and counterimage is confirmed at = z 1.302 S1. This makes it the first double source plane system with spectroscopic redshifts of both sources. Interestingly, redshifts of two of the knots embedded in the outer ring are found to be offset by D = z 0.002 from the other knots, suggesting that the outer ring consists of at least two distinct components in the source plane. We perform lens modeling with two independent codes and successfully reproduce the main features of the system. However, two of the lensed sources separated by ∼0.7 arcsec cannot be reproduced by a smooth potential, and the addition of substructure to the lens potential is required to reproduce them. Higher-resolution imaging of the system will help decipher the origin of this lensing feature and potentially detect the substructure.

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Cosmological constraints from the double source plane lens SDSSJ0946+1006

Cited by 119 publications

References 41 publications

The DES Bright Arcs Survey: Hundreds of Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey Science Verification and Year 1 Observations

The DES Bright Arcs Survey: Hundreds of Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey Science Verification and Year 1 Observations

Core or Cusps: The Central Dark Matter Profile of a Strong Lensing Cluster with a Bright Central Image at Redshift 1

A Spectroscopically Confirmed Double Source Plane Lens System in the Hyper Suprime-Cam Subaru Strategic Program

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