THE CLUSTER LENSING AND SUPERNOVA SURVEY WITH HUBBLE (CLASH): STRONG-LENSING ANALYSIS OF A383 FROM 16-BAND HST/WFC3/ACS IMAGING

Journal Article · Thu Dec 01 00:00:00 EST 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/742/2/117· OSTI ID:22004589

Zitrin, A ^[1]; Broadhurst, T ^[2]; Coe, D; Postman, M; Bradley, L; Koekemoer, A ^[3]; Umetsu, K ^[4]; Benitez, N; Molino, A ^[5]; Meneghetti, M ^[6]; Medezinski, E; Zheng, W; Ford, H; Lemze, D ^[7]; Jouvel, S; Lahav, O ^[8]; Merten, J ^[9]; Kelson, D ^[10]; Nonino, M ^[11]; Donahue, M ^[12] ; others, and

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1. School of Physics and Astronomy, Tel Aviv University, Tel Aviv (Israel)
2. Department of Theoretical Physics, University of Basque Country, Bilbao (Spain)
3. Space Telescope Science Institute, Baltimore, MD (United States)
4. Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan (China)
5. Instituto de Astrofisica de Andalucia (CSIC), Granada (Spain)
6. INAF, Osservatorio Astronomico di Bologna (Italy)
7. Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD (United States)
8. Department of Physics and Astronomy, University College London, London (United Kingdom)
9. Institut fuer Theoretische Astrophysik, ZAH, Heidelberg (Germany)
10. Observatories of the Carnegie Institution of Washington, Pasadena, CA (United States)
11. INAF-Osservatorio Astronomico di Trieste, Trieste (Italy)
12. Department of Physics and Astronomy, Michigan State University, East Lansing, MI (United States)

We examine the inner mass distribution of the relaxed galaxy cluster A383 (z = 0.189), in deep 16 band Hubble Space Telescope/ACS+WFC3 imaging taken as part of the Cluster Lensing And Supernova survey with Hubble (CLASH) multi-cycle treasury program. Our program is designed to study the dark matter distribution in 25 massive clusters, and balances depth with a wide wavelength coverage, 2000-16000 A, to better identify lensed systems and generate precise photometric redshifts. This photometric information together with the predictive strength of our strong-lensing analysis method identifies 13 new multiply lensed images and candidates, so that a total of 27 multiple images of nine systems are used to tightly constrain the inner mass profile gradient, dlog {Sigma}/dlog r {approx_equal} -0.6 {+-} 0.1 (r < 160 kpc). We find consistency with the standard distance-redshift relation for the full range spanned by the lensed images, 1.01 < z < 6.03, with the higher-redshift sources deflected through larger angles as expected. The inner mass profile derived here is consistent with the results of our independent weak-lensing analysis of wide-field Subaru images, with good agreement in the region of overlap ({approx}0.7-1 arcmin). Combining weak and strong lensing, the overall mass profile is well fitted by a Navarro-Frenk-White profile with M{sub vir} = (5.37{sup +0.70}{sub -0.63} {+-} 0.26) Multiplication-Sign 10{sup 14} M{sub Sun} h{sup -1} and a relatively high concentration, c{sub vir} = 8.77{sup +0.44}{sub -0.42} {+-} 0.23, which lies above the standard c-M relation similar to other well-studied clusters. The critical radius of A383 is modest by the standards of other lensing clusters, r{sub E} {approx_equal} 16 {+-} 2'' (for z{sub s} = 2.55), so the relatively large number of lensed images uncovered here with precise photometric redshifts validates our imaging strategy for the CLASH survey. In total we aim to provide similarly high-quality lensing data for 25 clusters, 20 of which are X-ray-selected relaxed clusters, enabling a precise determination of the representative mass profile free from lensing bias.

• OSTI ID: 22004589
• Journal Information: Astrophysical Journal, Vol. 742, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
GALAXIES
GALAXY CLUSTERS
MASS
MASS DISTRIBUTION
NONLUMINOUS MATTER
RED SHIFT
TELESCOPES