Joint Strong and Weak Lensing Analysis of the Massive Cluster Field J0850+3604
AuthorWong, Kenneth C.
Keeton, Charles R.
Zabludoff, Ann I.
Ammons, S. Mark
French, K. Decker
AffiliationUniv Arizona, Steward Observ
Keywordsgalaxies: clusters: individual (Zwicky 1953)
gravitational lensing: strong
gravitational lensing: weak
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationJoint Strong and Weak Lensing Analysis of the Massive Cluster Field J0850+3604 2017, 844 (2):127 The Astrophysical Journal
JournalThe Astrophysical Journal
Rights© 2017. The American Astronomical Society. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractWe present a combined strong and weak lensing analysis of the J085007.6+360428 (J0850) field, which contains the massive cluster Zwicky 1953. This field was selected for its high projected concentration of luminous red galaxies. Using Subaru/Suprime-Cam BVR(c)I(c)i'z' imaging and MMT/Hectospec spectroscopy, we first perform a weak lensing shear analysis to constrain the mass distribution in this field, including the cluster at z = 0.3774 and a smaller foreground halo at z = 0.2713. We then add a strong lensing constraint from a multiply imaged galaxy in the imaging data with a photometric redshift of z approximate to 5.03. Unlike previous cluster-scale lens analyses, our technique accounts for the full three-dimensional mass structure in the beam, including galaxies along the line of sight. In contrast with past cluster analyses that used only lensed image positions as constraints, we use the full surface brightness distribution of the images. This method predicts that the source galaxy crosses a lensing caustic, such that one image is a highly magnified "fold arc" that could be used to probe the source galaxy's structure at ultra-high spatial resolution (< 30 pc). We calculate the mass of the primary cluster to be M-vir = 2.93(-0.65)(+0.71) x 10(15) M-circle dot. with a concentration of C-vir = 3.46(-0.59)(+0.70), consistent with the mass-concentration relation of massive clusters at a similar redshift. The large mass of this cluster makes J0850 an excellent field for leveraging lensing magnification to search for high-redshift galaxies, competitive with and complementary to that of well-studied clusters such as the HST Frontier Fields.
VersionFinal published version
SponsorsEACOA - East Asia Core Observatories Association; NSF [AST-1211385, AST-1211874]; Ministry of Science and Technology of Taiwan [MOST 103-2112-M-001-030-MY3, MOST 103-2112-M-001-003-MY3]; U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]