TY - JOUR
T1 - The Cluster Lensing and Supernova Survey with Hubble (CLASH)
T2 - Strong-Lensing analysis of A383 from 16-band HST/WFC3/ACS Imaging
AU - Zitrin, A.
AU - Broadhurst, T.
AU - Coe, D.
AU - Umetsu, K.
AU - Postman, M.
AU - Benítez, N.
AU - Meneghetti, M.
AU - Medezinski, E.
AU - Jouvel, S.
AU - Bradley, L.
AU - Koekemoer, A.
AU - Zheng, W.
AU - Ford, H.
AU - Merten, J.
AU - Kelson, D.
AU - Lahav, O.
AU - Lemze, D.
AU - Molino, A.
AU - Nonino, M.
AU - Donahue, M.
AU - Rosati, P.
AU - Van Der Wel, A.
AU - Bartelmann, M.
AU - Bouwens, R.
AU - Graur, O.
AU - Graves, G.
AU - Host, O.
AU - Infante, L.
AU - Jha, S.
AU - Jimenez-Teja, Y.
AU - Lazkoz, R.
AU - Maoz, D.
AU - McCully, C.
AU - Melchior, P.
AU - Moustakas, L. A.
AU - Ogaz, S.
AU - Patel, B.
AU - Regoes, E.
AU - Riess, A.
AU - Rodney, S.
AU - Seitz, S.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - We examine the inner mass distribution of the relaxed galaxy cluster A383 (z = 0.189), in deep 16band 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 Å, 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 Σ/dlog r ≃ -0.6 0.1 (r < 160kpc). 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 (0.7-1 arcmin). Combining weak and strong lensing, the overall mass profile is well fitted by a Navarro-Frenk-White profile with M vir = (5.37 +0.70 - 0.63± 0.26) × 1014 M ⊙ h -1 and a relatively high concentration, c vir = 8.77+0.44 - 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, rE ≃ 16 2″ (for zs = 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.
AB - We examine the inner mass distribution of the relaxed galaxy cluster A383 (z = 0.189), in deep 16band 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 Å, 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 Σ/dlog r ≃ -0.6 0.1 (r < 160kpc). 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 (0.7-1 arcmin). Combining weak and strong lensing, the overall mass profile is well fitted by a Navarro-Frenk-White profile with M vir = (5.37 +0.70 - 0.63± 0.26) × 1014 M ⊙ h -1 and a relatively high concentration, c vir = 8.77+0.44 - 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, rE ≃ 16 2″ (for zs = 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.
KW - dark matter
KW - galaxies: clusters: general
KW - galaxies: clusters: individual: A383
KW - galaxies: high-redshift
KW - gravitational lensing: strong
UR - http://www.scopus.com/inward/record.url?scp=81255169167&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/742/2/117
DO - 10.1088/0004-637X/742/2/117
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:81255169167
SN - 0004-637X
VL - 742
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 117
ER -