J/MNRAS/491/5524ivo://CDS.VizieR/J/MNRAS/491/5524doi:10.26093/cds/vizier.74915524CDSHung D.Lemaux B.C.Gal R.R.Tomczak A.R.Lubin L.M.Cucciati O.,Pelliccia D.Shen L.Le Fevre O.Wu P.-F.Kocevski D.D.Mei S.,Squires G.K.2024-08-20T20:15:05Z2020-01-10T10:01:18ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesvisible-astronomyspectroscopyredshiftedThe Observations of Redshift Evolution in Large-Scale Environments (ORELSE) survey is an ongoing imaging and spectroscopic campaign initially designed to study the effects of environment on galaxy evolution in high-redshift (z~1) large-scale structures. We use its rich data in combination with a powerful new technique, Voronoi tessellation Monte-Carlo (VMC) mapping, to search for serendipitous galaxy overdensities at 0.55<z<1.37 within 15 ORELSE fields, a combined spectroscopic footprint of ~1.4 square degrees. Through extensive tests with both observational data and our own mock galaxy catalogs, we optimize the method's many free parameters to maximize its efficacy for general overdensity searches. Our overdensity search yielded 402 new overdensity candidates with precisely measured redshifts and an unprecedented sensitivity down to low total overdensity masses M_tot_>5*10^13^M_{sun}_). Using the mock catalogs, we estimated the purity and completeness of our overdensity catalog as a function of redshift, total mass, and spectroscopic redshift fraction, finding impressive levels of both 0.92/0.83 and 0.60/0.49 for purity/completeness at z=0.8 and z=1.2, respectively, for all overdensity masses at spectroscopic fractions of ~20%. With VMC mapping, we are able to measure precise systemic redshifts, provide an estimate of the total gravitating mass, and maintain high levels of purity and completeness at z~1 even with only moderate levels of spectroscopy. Other methods (e.g., red-sequence overdensities and hot medium reliant detections) begin to fail at similar redshifts, which attests to VMC mapping's potential to be a powerful tool for current and future wide-field galaxy evolution surveys at z~1 and beyond.2020MNRAS.491.5524Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/491/5524CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/491/5524https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/491/5524http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/491/5524https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/491/5524https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/491/5524http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/491/5524GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/491/5524/candid (All Overdensity Candidates found in 15 ORELSE fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/491/5524/candid?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/491/5524/candid?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/491/5524/candid?GETtext/xml+votable180.050000true241.0028543.355380.0055555555555555566/6069 6495 7178 7273 9831 9837 9842 10391 10599 10605 10992 11632 11791 11802 17686 17689 17692 17769 18111 28570 28581 28592https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/491/5524?format=asciiOpticalInfrareddefaultJ/MNRAS/491/5524/candidAll Overdensity Candidates found in 15 ORELSE fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldName of the field the overdensity candidate is inobs.fieldcharIdID number of the overdensity candidate in the given fieldmeta.id;meta.mainintPointsNumber of points used in the Gaussian fit, i.e., the number of redshift slices the candidate appears inmeta.numberintzMean redshift of the overdensity candidatesrc.redshiftfloate_z1 sigma redshift uncertaintystat.error;src.redshiftfloatsigmaRedshift dispersion of the overdensity candidate, described by the width of the Gaussian fitstat.stdevfloate_sigma1 sigma redshift dispersion uncertaintystat.errorfloatRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainlogMassTotal masslog(solMass)phys.massfloatE_logMass1 sigma positive uncertainty on logMasslog(solMass)stat.error;stat.maxfloate_logMass1 sigma negative uncertainty on logMasslog(solMass)stat.error;phys.massfloatSpecFracFraction of spectroscopic members in overdensity candidatemeta.numberfloat