Hubble space telescope combined strong and weak lensing analysis of the clash sample: Mass and magnification models and systematic uncertainties

Adi Zitrin, Agnese Fabris, Julian Merten, Peter Melchior, Massimo Meneghetti, Anton Koekemoer, Dan Coe, Matteo Maturi, Matthias Bartelmann, Marc Postman, Keiichi Umetsu, Gregor Seidel, Irene Sendra, Tom Broadhurst, Italo Balestra, Andrea Biviano, Claudio Grillo, Amata Mercurio, Mario Nonino, Piero RosatiLarry Bradley, Mauricio Carrasco, Megan Donahue, Holland Ford, Brenda Louise Frye, John Moustakas

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

We present results from a comprehensive lensing analysis in Hubble Space Telescope (HST) data of the complete Cluster Lensing And Supernova survey with Hubble cluster sample. We identify previously undiscovered multiple images, allowing improved or first constraints on the cluster inner mass distributions and profiles. We combine these strong lensing constraints with weak lensing shape measurements within the HST field of view (FOV) to jointly constrain the mass distributions. The analysis is performed in two different common parameterizations (one adopts light-traces-mass for both galaxies and dark matter while the other adopts an analytical, elliptical Navarro-Frenk-White form for the dark matter) to provide a better assessment of the underlying systematics - which is most important for deep, cluster-lensing surveys, especially when studying magnified high-redshift objects. We find that the typical (median), relative systematic differences throughout the central FOV are ∼40% in the (dimensionless) mass density, κ, and ∼20% in the magnification, μ. We show maps of these differences for each cluster, as well as the mass distributions, critical curves, and two-dimensional (2D)-integrated mass profiles. For the Einstein radii (zs = 2) we find that all typically agree within 10% between the two models, and Einstein masses agree, typically, within ∼15%. At larger radii, the total projected, 2D-integrated mass profiles of the two models, within r ∼ 2′, differ by ∼30%. Stacking the surface-density profiles of the sample from the two methods together, we obtain an average slope of dlog (Σ)/dlog (r) ∼ -0.64 ± 0.1, in the radial range [5350] kpc. Last, we also characterize the behavior of the average magnification, surface density, and shear differences between the two models as a function of both the radius from the center and the best-fit values of these quantities. All mass models and magnification maps are made publicly available for the community.

Original languageEnglish (US)
Article number44
JournalAstrophysical Journal
Volume801
Issue number1
DOIs
StatePublished - Mar 1 2015

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magnification
Hubble Space Telescope
mass distribution
profiles
field of view
radii
dark matter
parameterization
supernovae
analysis
slopes
galaxies
shear
stacking
curves

Keywords

  • galaxies: clusters: general
  • galaxies: high-redshift
  • gravitational lensing: strong
  • gravitational lensing: weak

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Hubble space telescope combined strong and weak lensing analysis of the clash sample : Mass and magnification models and systematic uncertainties. / Zitrin, Adi; Fabris, Agnese; Merten, Julian; Melchior, Peter; Meneghetti, Massimo; Koekemoer, Anton; Coe, Dan; Maturi, Matteo; Bartelmann, Matthias; Postman, Marc; Umetsu, Keiichi; Seidel, Gregor; Sendra, Irene; Broadhurst, Tom; Balestra, Italo; Biviano, Andrea; Grillo, Claudio; Mercurio, Amata; Nonino, Mario; Rosati, Piero; Bradley, Larry; Carrasco, Mauricio; Donahue, Megan; Ford, Holland; Frye, Brenda Louise; Moustakas, John.

In: Astrophysical Journal, Vol. 801, No. 1, 44, 01.03.2015.

Research output: Contribution to journalArticle

Zitrin, A, Fabris, A, Merten, J, Melchior, P, Meneghetti, M, Koekemoer, A, Coe, D, Maturi, M, Bartelmann, M, Postman, M, Umetsu, K, Seidel, G, Sendra, I, Broadhurst, T, Balestra, I, Biviano, A, Grillo, C, Mercurio, A, Nonino, M, Rosati, P, Bradley, L, Carrasco, M, Donahue, M, Ford, H, Frye, BL & Moustakas, J 2015, 'Hubble space telescope combined strong and weak lensing analysis of the clash sample: Mass and magnification models and systematic uncertainties', Astrophysical Journal, vol. 801, no. 1, 44. https://doi.org/10.1088/0004-637X/801/1/44
Zitrin, Adi ; Fabris, Agnese ; Merten, Julian ; Melchior, Peter ; Meneghetti, Massimo ; Koekemoer, Anton ; Coe, Dan ; Maturi, Matteo ; Bartelmann, Matthias ; Postman, Marc ; Umetsu, Keiichi ; Seidel, Gregor ; Sendra, Irene ; Broadhurst, Tom ; Balestra, Italo ; Biviano, Andrea ; Grillo, Claudio ; Mercurio, Amata ; Nonino, Mario ; Rosati, Piero ; Bradley, Larry ; Carrasco, Mauricio ; Donahue, Megan ; Ford, Holland ; Frye, Brenda Louise ; Moustakas, John. / Hubble space telescope combined strong and weak lensing analysis of the clash sample : Mass and magnification models and systematic uncertainties. In: Astrophysical Journal. 2015 ; Vol. 801, No. 1.
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AU - Merten, Julian

AU - Melchior, Peter

AU - Meneghetti, Massimo

AU - Koekemoer, Anton

AU - Coe, Dan

AU - Maturi, Matteo

AU - Bartelmann, Matthias

AU - Postman, Marc

AU - Umetsu, Keiichi

AU - Seidel, Gregor

AU - Sendra, Irene

AU - Broadhurst, Tom

AU - Balestra, Italo

AU - Biviano, Andrea

AU - Grillo, Claudio

AU - Mercurio, Amata

AU - Nonino, Mario

AU - Rosati, Piero

AU - Bradley, Larry

AU - Carrasco, Mauricio

AU - Donahue, Megan

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AU - Frye, Brenda Louise

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N2 - We present results from a comprehensive lensing analysis in Hubble Space Telescope (HST) data of the complete Cluster Lensing And Supernova survey with Hubble cluster sample. We identify previously undiscovered multiple images, allowing improved or first constraints on the cluster inner mass distributions and profiles. We combine these strong lensing constraints with weak lensing shape measurements within the HST field of view (FOV) to jointly constrain the mass distributions. The analysis is performed in two different common parameterizations (one adopts light-traces-mass for both galaxies and dark matter while the other adopts an analytical, elliptical Navarro-Frenk-White form for the dark matter) to provide a better assessment of the underlying systematics - which is most important for deep, cluster-lensing surveys, especially when studying magnified high-redshift objects. We find that the typical (median), relative systematic differences throughout the central FOV are ∼40% in the (dimensionless) mass density, κ, and ∼20% in the magnification, μ. We show maps of these differences for each cluster, as well as the mass distributions, critical curves, and two-dimensional (2D)-integrated mass profiles. For the Einstein radii (zs = 2) we find that all typically agree within 10% between the two models, and Einstein masses agree, typically, within ∼15%. At larger radii, the total projected, 2D-integrated mass profiles of the two models, within r ∼ 2′, differ by ∼30%. Stacking the surface-density profiles of the sample from the two methods together, we obtain an average slope of dlog (Σ)/dlog (r) ∼ -0.64 ± 0.1, in the radial range [5350] kpc. Last, we also characterize the behavior of the average magnification, surface density, and shear differences between the two models as a function of both the radius from the center and the best-fit values of these quantities. All mass models and magnification maps are made publicly available for the community.

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