J/ApJ/859/38ivo://CDS.VizieR/J/ApJ/859/38doi:10.26093/cds/vizier.18590038CDSNoirot G.Stern D.Mei S.Wylezalek D.Cooke E.A.De Breuck C.,Galametz A.Hatch N.A.Vernet J.Brodwin M.Eisenhardt P.,Gonzalez A.H.Jarvis M.Rettura A.Seymour N.Stanford S.A.2022-03-08T13:56:29Z2019-05-29T15:16:21ZCDS support team

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

cds-question@unistra.frgalaxy-clustersactive-galactic-nucleihst-photometryinfrared-astronomyspectroscopyredshiftedsurveysWe report spectroscopic results from our 40-orbit Hubble Space Telescope slitless grism spectroscopy program observing the 20 densest Clusters Around Radio-Loud AGN (CARLA) candidate galaxy clusters at 1.4<z<2.8. These candidate rich structures, among the richest and most distant known, were identified on the basis of [3.6]-[4.5] color from a 408hr multi-cycle Spitzer program targeting 420 distant radio-loud AGN. We report the spectroscopic confirmation of 16 distant structures at 1.4<z<2.8 associated with the targeted powerful high-redshift radio-loud AGN. We also report the serendipitous discovery and spectroscopic confirmation of seven additional structures at 0.87<z<2.12 not associated with the targeted radio-loud AGN. We find that 10^10^-10^11^M_{sun}_ member galaxies of our confirmed CARLA structures form significantly fewer stars than their field counterparts at all redshifts within 1.4<=z<=2. We also observe higher star-forming activity in the structure cores up to z=2, finding similar trends as cluster surveys at slightly lower redshifts (1.0<z<1.5). By design, our efficient strategy of obtaining just two grism orbits per field only obtains spectroscopic confirmation of emission line galaxies. Deeper spectroscopy will be required to study the population of evolved, massive galaxies in these (forming) clusters. Lacking multi-band coverage of the fields, we adopt a very conservative approach of calling all confirmations "structures," although we note that a number of features are consistent with some of them being bona fide galaxy clusters. Together this survey represents a unique and large homogenous sample of spectroscopically confirmed structures at high redshifts, potentially more than doubling the census of confirmed, massive clusters at z>1.4.2018ApJ...859...38Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/859/38CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)VIII/2 : Molonglo Reference Catalog of Radio Sources (Large+ 1981)J/AJ/127/2002 : Star Formation Rate of NFGS galaxies (Kewley+, 2004)J/ApJ/657/738 : SDF galaxies multi-photometry (Ly+, 2007)J/MNRAS/383/581 : Broad-line Balmer decrements in blue AGN (Dong+, 2008)J/ApJ/684/905 : IRAC Shallow Survey z>1 galaxy clusters (Eisenhardt+, 2008)J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/ApJ/746/85 : THe HST Cluster Supernova Survey. V. (Suzuki+, 2012)J/A+A/550/A114 : Integrated spectroscopy of HRS galaxies (Boselli+, 2013)J/A+A/559/A2 : Redshifts in the surroundings of MRC0156-252 (Galametz+, 2013)J/ApJ/763/127 : Galaxy clusters discovered in SPT survey (Reichardt+, 2013)J/ApJ/769/79 : Spitzer obs. of radio-loud AGNs (CARLA) (Wylezalek+, 2013)J/ApJS/213/25 : WISE Massive & Distant Clusters. II. (Stanford+, 2014)J/ApJ/786/17 : Luminosity functions for 1.3<z<3.2 galaxies (Wylezalek+, 2014)J/ApJS/216/27 : Galaxy clusters discovered in the SPT-SZ survey (Bleem+, 2015)J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)J/ApJ/844/78 : High-redshift COBRA survey: IRAC obs. (Paterno-Mahler+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/859/38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/859/38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/859/38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/859/38https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/859/38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/859/38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/859/38/table3 (Spectroscopic catalog content)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/859/38/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/859/38/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/859/38/table3?GETtext/xml+votable180.050000true19.237792745-20.8580620280.0055555555555555566/5411 5562 6546 7472 8632 10229 10832 10849 11480 11782 16722 18773 20111 20122 24762-24763 27436 27468 27814 38828-38829 47049 483191.2299896717679617e-19 1.6234874322677612e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/859/38?format=asciiInfrareddefaultJ/ApJ/859/38/table2Clusters Around Radio-Loud AGN (CARLA) HST resultsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_Field[csu] Flag on Field (1)meta.codecharFieldField identifiermeta.id;obs.fieldcharprimarysigIRAC[4/8]? Overdensity significance of color-selected sources above the field value (Wylezalek+ 2014, J/ApJ/786/17) {sigma}_IRAC_stat.fit.goodnessfloatnullablezRLAGN[1.3/2.8]? Radio loud AGN redshiftsrc.redshift;pos.heliocentricfloatnullablezClavg[0.8/2.9] Mean redshift of structure memberssrc.redshift;stat.meanfloatu_zClavg[)] Uncertainty flag on zClavg (2)meta.code.errorcharzClmed[0.8/2.9] Median redshift of structure memberssrc.redshift;stat.medianfloatu_zClmed[)] Uncertainty flag on zClmed (2)meta.code.errorcharu_HSTcl[(] Uncertainty flag on HSTcl (2)meta.code.errorcharHSTcl[2/14] Number of HST/F140W confirmed structure membersmeta.numberintHSTtot[23/51] Total number of HST sources for which we measure a redshiftmeta.numberintu_IRACcl[(] Uncertainty flag on IRACcl (2)meta.code.errorcharIRACcl[0/9] Number of Spitzer/IRAC confirmed structure membersmeta.numberintIRACtot[8/28] Total number of Spitzer/IRAC sources for which we measure a redshiftmeta.numberintu_Colcl[(] Uncertainty flag on Colcl (2)meta.code.errorcharColcl[0/8] Number of Spitzer/IRAC [3.6]-[4.5]{>}-0.1 color-selected confirmed structure membersmeta.numberintColtot[7/18] Total number of Spitzer/IRAC color-selected sources for which we measure a redshiftmeta.numberintNobsNumber of HST observations in this field (link to Table 1)meta.numberintnullableNsNumber of sources in this field (link to Table 3)meta.numberintnullableJ/ApJ/859/38/table3Spectroscopic catalog contente_FO3[3e-18/3e-15]? Uncertainty in FO3mW.m**-2stat.errordoublenullableFO2[1e-17/4e-16]? The [OII]3727+3729{AA} flux; erg/s/cm^2^mW.m**-2phot.fluxdoublenullablee_FO2[1e-17/10e-17]? Uncertainty in FO2mW.m**-2stat.errordoublenullableSimbadSimbad column added by the CDSmeta.ref.urlcharFieldField identifier (1)meta.id;obs.fieldcharq_zQuality of z (A=very secure) (see section 4.1)meta.code.qual;src.redshiftcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[2/90000] Unique source identifier from Fieldmeta.id;meta.mainintRAJ2000[19.2/359] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-29.1/63.2] Declination (J2000)degpos.eq.dec;meta.mainF140Wmag[17.1/26.5] HST/WFC3 F140W filter AB magnitudemagphot.mag;em.IR.Hfloate_F140Wmag[0.001/0.3] Uncertainty in F140Wmagmagstat.errorfloatz[0.3/2.9] Redshiftsrc.redshiftfloate_z[0.002/0.02]? Uncertainty in zstat.error;src.redshiftfloatnullableFHa[1e-17/7e-14]? H{alpha} flux; erg/s/cm^2^ (2)mW.m**-2phot.fluxdoublenullablee_FHa[7e-18/3e-15]? Uncertainty in FHamW.m**-2stat.errordoublenullableFHb[1e-17/2e-14]? H{beta} flux; erg/s/cm^2^mW.m**-2phot.fluxdoublenullablee_FHb[1e-17/4e-15]? Uncertainty in FHbmW.m**-2stat.errordoublenullableFO3[7e-18/2e-14]? The [OIII]5007{AA} flux; erg/s/cm^2^mW.m**-2phot.fluxdoublenullableJ/ApJ/859/38/table1HST WFC3 observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharDateUT date of observationtime.epoch;obsnullablef_DateFlag on Date (1)meta.codecharPA[-160/173] Position angle; east of northdegpos.posAngintExp1[462/537] HST/WFC3 F140W exposure timestime.duration;obs.exposure;em.UV.100-200nmintExp2[2012/2262] HST/WFC3 G141 grism exposure timestime.duration;obs.exposureint