Subaru weak lensing measurement of a <i>z</i>=0.81 cluster discovered by the Atacama Cosmology Telescope Survey

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dc.contributor.authorMiyatake, Hironao
dc.contributor.authorNishizawa, Atsushi J.
dc.contributor.authorTakada, Masahiro
dc.contributor.authorMandelbaum, Rachel
dc.contributor.authorMineo, Sogo
dc.contributor.authorAihara, Hiroaki
dc.contributor.authorSpergel, David N.
dc.contributor.authorBickerton, Steven J.
dc.contributor.authorBond, J. Richard
dc.contributor.authorGralla, Megan
dc.contributor.authorHajian, Amir
dc.contributor.authorHilton, Matt
dc.contributor.authorHincks, Adam D.
dc.contributor.authorHughes, John P.
dc.contributor.authorInfante, Leopoldo
dc.contributor.authorLin, Yen-Ting
dc.contributor.authorLupton, Robert H.
dc.contributor.authorMarriage, Tobias A.
dc.contributor.authorMarsden, Danica
dc.contributor.authorMenanteau, Felipe
dc.contributor.authorMiyazaki, Satoshi
dc.contributor.authorMoodley, Kavilan
dc.contributor.authorNiemack, Michael D.
dc.contributor.authorOguri, Masamune
dc.contributor.authorPrice, Paul A.
dc.contributor.authorReese, Erik D.
dc.contributor.authorSifon, Cristobal
dc.contributor.authorWollack, Edward J.
dc.contributor.authorYasuda, Naoki
dc.date.accessioned2025-01-24T00:05:10Z
dc.date.available2025-01-24T00:05:10Z
dc.date.issued2013
dc.description.abstractWe present a Subaru weak lensing measurement of ACT-CL J0022.2-0036, one of the most luminous, high-redshift (z = 0.81) Sunyaev-Zel'dovich (SZ) clusters discovered in the 268 deg(2) equatorial region survey of the Atacama Cosmology Telescope that overlaps with Sloan Digital Sky Survey (SDSS) Stripe 82 field. Ours is the first weak lensing study with Subaru at such high redshifts. For the weak lensing analysis using i'-band images, we use a model-fitting (Gauss-Laguerre shapelet) method to measure shapes of galaxy images, where we fit galaxy images in different exposures simultaneously to obtain best-fitting ellipticities taking into account the different point spread functions (PSFs) in each exposure. We also take into account the astrometric distortion effect on galaxy images by performing the model fitting in the world coordinate system. To select background galaxies behind the cluster at z = 0.81, we use photometric redshift estimates for every galaxy derived from the co-added images of multi-passband Br'i'z'Y, with PSF matching/homogenization. After a photometric redshift cut for background galaxy selection, we detect the tangential weak lensing distortion signal with a total signal-to-noise ratio of about 3.7. By fitting a Navarro-Frenk-White model to the measured shear profile, we find the cluster mass to be M-200 (rho) over barm = [7.5(-2.8)(+3.2)(stat.)(+1.3)(-0.6)(sys.)] x 10(14) M-circle dot h(-1). The weak lensing-derived mass is consistent with previous mass estimates based on the SZ observation, with assumptions of hydrostatic equilibrium and virial theorem, as well as with scaling relations between SZ signal and mass derived from weak lensing, X-ray and velocity dispersion, within the measurement errors. We also show that the existence of ACT-CL J0022.2-0036 at z = 0.81 is consistent with the cluster abundance prediction of the Lambda-dominated cold dark matter structure formation model. We thus demonstrate the capability of Subaru-type ground-based images for studying weak lensing of high-redshift clusters.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/sts643
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/sts643
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101825
dc.identifier.wosidWOS:000318272600072
dc.issue.numero4
dc.language.isoen
dc.pagina.final3644
dc.pagina.inicio3627
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgravitational lensing: weak
dc.subjectgalaxies: clusters: individual: ACT-CL J0022.2-0036
dc.subjectcosmology: observation
dc.titleSubaru weak lensing measurement of a <i>z</i>=0.81 cluster discovered by the Atacama Cosmology Telescope Survey
dc.typeartículo
dc.volumen429
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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