Weak lensing analysis of RXC J2248.7−4431

Gruen, David; Brimioulle, F.; Seitz, S.; Lee, Chien‐Hsiu; Young, J.; Koppenhoefer, J.; Eichner, T.; Riffeser, A.; Vikram, V.; Weidinger, T.; Zenteno, A.

doi:10.1093/mnras/stt566

Cited by 51 publications

(84 citation statements)

References 72 publications

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“…4, we find that the dark matter follows an elongated distribution in the diagonal direction. The same elongation and orientation is found in weak lensing analysis of the same cluster on scales up to 30 arcminutes (Gruen et al 2013). The elongation is in the direction of a second clump in the north-east corner of the field of view.…”

Section: Discussionsupporting

confidence: 79%

“…This large-scale elongation is aligned with the major axis of a prominent central BCG Monna et al 2014;Richard et al 2014;Zitrin et al 2015), having a similar elongation. This elongation extends well beyond the virial radius of the cluster (Gruen et al 2013), but with an azimuthally averaged large scale massive profile that fits well the NFW form out to a radius of 2 Mpc/h (Umetsu et al 2015). In this paper, we make a strong lensing analysis of the deep new optical HFF data now completed for this cluster, using our general free-form lensing technique (Diego et al 2005a(Diego et al , 2007(Diego et al , 2016Sendra et al 2014).…”

Section: Introductionmentioning

confidence: 67%

“…This cluster has been studied previously in the context of gravitational lensing because of its status as one of the largest lenses in the Southern sky. It was chosen as a target for the CLASH program, which confirmed it as a valuable lens by virtue of its large magnification (Balestra et al 2013;Boone et al 2013;Gruen et al 2013;Bradley et al 2014;Johnson et al 2014;Monna et al 2014;Richard et al 2014;Umetsu et al 2015;Zitrin et al 2015). Recently, VLT spectroscopy has provided accurate redshifts for many of the previously known arclets Caminha et al (2015a).…”

Section: Introductionmentioning

confidence: 99%

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A free-form mass model of the Hubble Frontier Fields cluster AS1063 (RXC J2248.7−4431) with over one hundred constraints

Diego

Broadhurst

Wong

et al. 2016

Mon. Not. R. Astron. Soc.

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We derive a free-form mass distribution for the massive cluster AS1063 (z=0.348) using the completed optical imaging from the Hubble Frontier Fields programme. Based on a subset of 11 multiply lensed systems with spectroscopic redshift we produce a lens model that is accurate enough to unveil new multiply lensed systems, totalling over a 100 arclets, and to estimate their redshifts geometrically. Consistency is found between this precise model and that obtained using only the subset of lensed sources with spectroscopically measured redshifts.Although a relatively large elongation of the mass distribution is apparent relative to the X-ray map, no significant offset is found between the centroid of our mass distribution and that of the X-ray emission map, suggesting a relatively relaxed state for this cluster. For the well resolved lensed images we provide detailed model comparisons to illustrate the precision of our model and hence the reliability of our de-lensed sources. A clear linear structure is associated with one such source extending 23 kpc in length, that could be an example of jet-induced star formation, at redshift z ≈ 3.1.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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A free-form mass model of the Hubble Frontier Fields cluster AS1063 (RXC J2248.7−4431) with over one hundred constraints

Diego

Broadhurst

Wong

et al. 2016

Mon. Not. R. Astron. Soc.

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“…Like the other Frontier Field clusters, its map of galaxy density shows significant substructure, with an X-ray peak offset from the primary peak of galaxy density (Gómez et al 2012). Weak-lensing analysis also identified multiple substructures, and gives a mass of the central cluster in agreement with X-ray and SZ calculations (Gruen et al 2013). Selected as a CLASH cluster, the HST imaging revealed a quintuply lensed z∼6 galaxy (Balestra et al 2013;Monna et al 2013).…”

Section: Abell S1063mentioning

confidence: 53%

The Frontier Fields: Survey Design and Initial Results

Lotz

Koekemoer

Coe

et al. 2017

ApJ

611

574

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What are the faintest distant galaxies we can see with the Hubble Space Telescope (HST) now, before the launch of the James Webb Space Telescope? This is the challenge taken up by the Frontier Fields, a Director's discretionary time campaign with HST and the Spitzer Space Telescope to see deeper into the universe than ever before. The Frontier Fields combines the power of HST and Spitzer with the natural gravitational telescopes of massive highmagnification clusters of galaxies to produce the deepest observations of clusters and their lensed galaxies ever obtained. Six clusters-Abell 2744, MACSJ0416.1-2403, MACSJ0717.5+3745, MACSJ1149.5+2223, Abell S1063, and Abell 370-have been targeted by the HST ACS/WFC and WFC3/IR cameras with coordinated parallel fields for over 840 HST orbits. The parallel fields are the second-deepest observations thus far by HST with 5σ point-source depths of ∼29th ABmag. Galaxies behind the clusters experience typical magnification factors of a few, with small regions magnified by factors of 10-100. Therefore, the Frontier Field cluster HST images achieve intrinsic depths of ∼30-33 mag over very small volumes. Spitzer has obtained over 1000 hr of Director's discretionary imaging of the Frontier Field cluster and parallels in IRAC 3.6 and 4.5 μm bands to 5σ point-source depths of ∼26.5, 26.0 ABmag. We demonstrate the exceptional sensitivity of the HST Frontier Field images to faint high-redshift galaxies, and review the initial results related to the primary science goals.

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“…We also note that photometric redshifts based on upto five photometric bands are becoming more common as a method for selecting background galaxies (Limousin et al 2007; Gavazzi et al 2009;Gruen et al 2013;Applegate et al 2014;McCleary, dell'Antonio & Huwe 2015;Melchior et al 2015). However photometric redshifts based on a small number of filters are problematic for galaxies with blue observed colours because their spectral energy distribution is relatively featureless.…”

Section: Introductionmentioning

confidence: 93%

LoCuSS: weak-lensing mass calibration of galaxy clusters

Okabe

Smith

2016

Mon. Not. R. Astron. Soc.

156

179

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We present weak-lensing mass measurements of 50 X-ray luminous galaxy clusters at 0.15 z 0.3, based on uniform high quality observations with Suprime-Cam mounted on the 8.2-m Subaru telescope. We pay close attention to possible systematic biases, aiming to control them at the ∼ < 4 per cent level. The dominant source of systematic bias in weak-lensing measurements of the mass of individual galaxy clusters is contamination of background galaxy catalogues by faint cluster and foreground galaxies. We extend our conservative method for selecting background galaxies with (V − i ′ ) colours redder than the red sequence of cluster members to use a colour-cut that depends on cluster-centric radius. This allows us to define background galaxy samples that suffer 1 per cent contamination, and comprise 13 galaxies per square arcminute. Thanks to the purity of our background galaxy catalogue, the largest systematic that we identify in our analysis is a shape measurement bias of 3 per cent, that we measure using simulations that probe weak shears upto g = 0.3. Our individual cluster mass and concentration measurements are in excellent agreement with predictions of the mass-concentration relation. Equally, our stacked shear profile is in excellent agreement with the Navarro Frenk and White profile. Our new LoCuSS mass measurements are consistent with the CCCP and CLASH surveys, and in tension with the Weighing the Giants at ∼ 1 − 2σ significance. Overall, the consensus at z 0.3 that is emerging from these complementary surveys represents important progress for cluster mass calibration, and augurs well for cluster cosmology.

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Weak lensing analysis of RXC J2248.7−4431

Cited by 51 publications

References 72 publications

A free-form mass model of the Hubble Frontier Fields cluster AS1063 (RXC J2248.7−4431) with over one hundred constraints

A free-form mass model of the Hubble Frontier Fields cluster AS1063 (RXC J2248.7−4431) with over one hundred constraints

The Frontier Fields: Survey Design and Initial Results

LoCuSS: weak-lensing mass calibration of galaxy clusters

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