Precise strong lensing mass profile of the CLASH galaxy cluster MACS 2129

Monna, A.; Seitz, S.; Balestra, I.; Rosati, P.; Grillo, C.; Halkola, A.; Suyu, S. H.; Coe, Dan; Caminha, G. B.; Frye, Brenda; Koekemoer, Anton M.; Mercurio, A.; Nonino, M.; Postman, Marc; Zitrin, Adi

doi:10.1093/mnras/stx015

Cited by 28 publications

(61 citation statements)

References 33 publications

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“…Using data for clusters at z ∼ 0.2 observed with the CFH12k instrument on the Canada-Hawaii-France Telescope (CFHT), Limousin et al (2007) arrived at a similar conclusion. Halkola et al (2007) and Suyu & Halkola (2010) used strong lensing measurements of a single cluster and a small galaxy group, respectively, and also found evidence for strong truncation of the density profiles of satellite galaxies, and other strong lensing studies have reached similar conclusions (e.g., Eichner et al 2013;Monna et al 2015Monna et al , 2017. Likewise, Okabe et al (2014) analyzed the weak lensing signal of subhaloes in the Coma cluster and found that, while group-scale subhaloes show (mild) evidence of sharp truncations at radii r < 200 kpc, stacked weak lensing measurements of satellite galaxies show no signs of truncation.…”

Section: Introductionmentioning

confidence: 64%

The galaxy–subhalo connection in low-redshift galaxy clusters from weak gravitational lensing

Sifón

Herbonnet

Hoekstra

et al. 2018

Monthly Notices of the Royal Astronomical Society

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We measure the gravitational lensing signal around satellite galaxies in a sample of galaxy clusters at z < 0.15 by combining high-quality imaging data from the Canada-France-Hawaii Telescope with a large sample of spectroscopically-confirmed cluster members. We use extensive image simulations to assess the accuracy of shape measurements of faint, background sources in the vicinity of bright satellite galaxies. We find a small but significant bias, as light from the lenses makes the shapes of background galaxies appear radially aligned with the lens. We account for this bias by applying a correction that depends on both lens size and magnitude. We also correct for contamination of the source sample by cluster members. We use a physically-motivated definition of subhalo mass, namely the mass bound to the subhalo, m bg , similar to definitions used by common subhalo finders in numerical simulations. Binning the satellites by stellar mass we provide a direct measurement of the subhalo-to-stellar-mass relation, log m bg /M = (11.54 ± 0.05) + (0.95 ± 0.10) log[m /(2 × 10 10 M )]. This best-fitting relation implies that, at a stellar mass m ∼ 3 × 10 10 M , subhalo masses are roughly 50 per cent of those of central galaxies, and this fraction decreases at higher stellar masses. We find some evidence for a sharp change in the total-to-stellar mass ratio around the clusters' scale radius, which could be interpreted as galaxies within the scale radius having suffered more strongly from tidal stripping, but remain cautious regarding this interpretation.

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Section: Introductionmentioning

confidence: 64%

The galaxy–subhalo connection in low-redshift galaxy clusters from weak gravitational lensing

Sifón

Herbonnet

Hoekstra

et al. 2018

Monthly Notices of the Royal Astronomical Society

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“…The input cosmology was also revealed. We refer the reader to Meneghetti et al (2016) for a detailed presentation on how Ares and Hera mass distributions were generated, here we only present a quick overview.…”

Section: The Datamentioning

confidence: 99%

“…MNRAS 000, 1-19 (2017) (Navarro et al 1997) or Hernsquist (Hernquist 1990). For instance, large-scale potentials are modelled with either a NFW or PIEMD, BCGs with PIEMD or Hernquist profiles and individual clusters members with a PIEMD profile, scaled according to the relations in Limousin et al (2005).…”

Section: Mass Modellingmentioning

confidence: 99%

“…Strong gravitational Lensing (SL, hereafter) is nowadays at the very heart of important issues in modern cosmology, allowing for instance to measure directly the total projected mass distribution (baryonic and dark) of galaxy cluster cores (e.g. Richard et al 2010;Zitrin & Broadhurst 2016;Monna et al 2017;Mahler et al 2017), to image very high redshift sources otherwise too faint to be detected without the grav-E-mail: ana.acebron@lam.fr itational magnification Richard et al 2008;Coe et al 2013;Atek et al 2015) and to constrain the geometry of the Universe D'Aloisio & Natarajan 2011;Magaña et al 2015;Caminha et al 2016) which is one of the long-standing challenges of modern cosmology.…”

Section: Introductionmentioning

confidence: 99%

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Hubble Frontier Fields: systematic errors in strong lensing models of galaxy clusters – implications for cosmography

Acebrón

Jullo

Limousin

et al. 2017

Monthly Notices of the Royal Astronomical Society

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Strong gravitational lensing by galaxy clusters is a fundamental tool to study dark matter and constrain the geometry of the Universe. Recently, the HST Frontier Fields program has allowed a significant improvement of mass and magnification measurements but lensing models still have a residual RMS between 0.2" and few arcseconds, not yet completely understood. Systematic errors have to be better understood and treated in order to use strong lensing clusters as reliable cosmological probes. We have analysed two simulated Hubble Frontier Fields-like clusters from the Hubble Frontier Fields Comparison Challenge, Ares and Hera. We use several estimators (relative bias on magnification, density profiles, ellipticity and orientation) to quantify the goodness of our reconstructions by comparing our multiple models, optimized with the parametric software Lenstool, with the input models. We have quantified the impact of systematic errors arising, first, from the choice of different density profiles and configurations and, secondly, from the availability of constraints (spectroscopic or photometric redshifts, redshift ranges of the background sources) in the parametric modelling of strong lensing galaxy clusters and therefore on the retrieval of cosmological parameters. We find that substructures in the outskirts have a significant impact on the position of the multiple images, yielding tighter cosmological contours. The need for wide-field imaging around massive clusters is thus reinforced. We show that competitive cosmological constraints can be obtained also with complex multimodal clusters and that photometric redshifts improve the constraints on cosmological parameters when considering a narrow range of (spectroscopic) redshifts for the sources.

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“…To disentangle the cluster-scale dark halo component from the galaxies' contribution, additional constraints sensitive to only one of the two components are necessary (Eichner et al 2013;Monna et al 2015). A common assumption is that the DM content of galaxies scales in proportion to their light (e.g.…”

Section: Introductionmentioning

confidence: 99%

Separating galaxies from the cluster dark matter halo in Abell 611

Monna

Seitz

Geller

et al. 2016

Mon. Not. R. Astron. Soc.

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We investigate the mass content of galaxies in the core of the galaxy cluster Abell 611. We perform a strong lensing analysis of the cluster core and use velocity dispersion measurements for individual cluster members as additional constraints. Despite the small number of multiply-imaged systems and cluster members with central velocity dispersions available in the core of A611, the addition of velocity dispersion measurements leads to tighter constraints on the mass associated with the galaxy component, and as a result, on the mass associated with the dark matter halo. Without the spectroscopic velocity dispersions, we would overestimate the mass of the galaxy component by a factor of ∼ 1.5, or, equivalently, we would underestimate the mass of the cluster dark halo by ∼ 5%. We perform an additional lensing analysis using surface brightness (SB) reconstruction of the tangential giant arc. This approach improves by up to a factor ∼ 10 the constraints on the mass parameters of the 5 galaxies close to the arc. The resulting parameters are in good agreement with the σ − r tr scaling relation derived in the pointlike analysis. The galaxy velocity dispersions resulting from the SB analysis are consistent at the 1σ confidence level with the spectroscopic measurements. In contrast the truncation radii for 2-3 galaxies depart significantly from the galaxy scaling relation and suggest differences in the stripping history from galaxy to galaxy.

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Precise strong lensing mass profile of the CLASH galaxy cluster MACS 2129

Cited by 28 publications

References 33 publications

The galaxy–subhalo connection in low-redshift galaxy clusters from weak gravitational lensing

The galaxy–subhalo connection in low-redshift galaxy clusters from weak gravitational lensing

Hubble Frontier Fields: systematic errors in strong lensing models of galaxy clusters – implications for cosmography

Separating galaxies from the cluster dark matter halo in Abell 611

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