J/ApJ/903/151ivo://CDS.VizieR/J/ApJ/903/151doi:10.26093/cds/vizier.19030151CDSYoon M.Lee W.Jee M.J.Finner K.Smith R.Kim J.-W.2023-08-16T15:34:12Z2022-03-14T07:15:03ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersvisible-astronomyspectroscopyredshiftedA521 has been a subject of extensive panchromatic studies from X-ray to radio. The cluster possesses a number of remarkable features, including a bright radio relic with a steep spectrum, more than three distinct galaxy groups forming a filament, and two disturbed X-ray peaks at odds with the distant position and tilted orientation of the radio relic. These lines of evidence indicate a complex merger. In this paper, we present a multiwavelength study of A521 based on Subaru optical, Hubble Space Telescope infrared, Chandra X-ray, Giant Metrewave Radio Telescope radio, and Multiple Mirror Telescope optical spectroscopic observations. Our weak-lensing (WL) analysis with improved systematics control reveals that A521 is mainly composed of three substructures aligned in the northwest to southeast orientation. These WL mass substructures are remarkably well-aligned with the cluster optical luminosity distribution constructed from our new enhanced cluster member catalog. These individual substructure masses are determined by simultaneously fitting three Navarro-Frenk-White profiles. We find that the total mass of A521 modeled by the superposition of the three halos is 13.0_-1.3_^+1.0^x10^14^M{odot}, a factor of 2 higher than the previous WL measurement. With these WL mass constraints combined with X-ray and radio features, we consider two merging scenarios, carry out the corresponding numerical simulations, and discuss the strengths and weaknesses of each case.2020ApJ...903..151Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/903/151CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/261 : GOODS initial results (Giavalisco+, 2004)J/A+A/399/813 : Multiple merging events in Abell 521 (Ferrari, 2003)J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)J/A+A/581/A14 : Updated Planck catalogue PSZ1 (Planck+, 2015)J/MNRAS/466/2614 : Complex cluster Abell 1758 stars (Monteiro-Oliveira+, 2017)J/ApJ/882/69 : Radio merging galaxy cluster substructures (Golovich+, 2019)J/ApJS/240/39 : Merging galaxy cluster deep observations (Golovich+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/903/151https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/903/151http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/903/151https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/903/151https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/903/151http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/903/151GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/903/151/table1 (*MMT Hectospec spectroscopic redshift catalog of the A521 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/903/151/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/903/151/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/903/151/table1?GETtext/xml+votable180.050000true73.552825-10.472746940.0055555555555555566/22605 22607 22616 22618https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/903/151?format=asciiOpticaldefaultJ/ApJ/903/151/table1*MMT Hectospec spectroscopic redshift catalog of the A521 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[72/75] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-11/-9] Declination (J2000)degpos.eq.dec;meta.mainzspec[0.09/0.67] Spectroscopic redshiftsrc.redshiftdoublee_zspec[7.32e-06/0.00045] 1-sigma uncertainty in zspecstat.errordoubleSimbadSimbad column added by the CDSmeta.ref.urlchar