J/ApJS/278/51ivo://CDS.VizieR/J/ApJS/278/51CDSKang W.Hwang Ho S.Okabe N.Park C.2026-05-07T07:47:31Z2026-05-07T08:41:21ZCDS support team

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

cds-question@unistra.frgalaxy-clustersvisible-astronomyspectroscopyredshiftedsurveysgravitational-lensingapparent-magnitudeWe study the physical properties of weak-lensing subhalos in the Coma cluster of galaxies using data from galaxy redshift surveys. The data include 12,989 galaxies with measured spectroscopic redshifts (2184 from our MMT/Hectospec observations and 10,807 from the literature). The r-band magnitude limit at which the differential spectroscopic completeness drops below 50% is 20.2mag, which is spatially uniform in a region of 4.5deg2 where the weak-lensing map of Okabe+ 2014ApJ...784...90O exists. We identify 1337 member galaxies in this field and use them to understand the nature of 32 subhalos detected in a weak-lensing analysis. We use Gaussian mixture modeling (GMM) in the line-of-sight velocity domain to measure the mean velocity, the velocity dispersion, and the number of subhalo galaxies by mitigating contamination from interloping galaxies. Using subhalo properties calculated with the GMM, we find no significant difference in the redshift space distribution between the cluster member galaxies and subhalos. We find that the weak-lensing mass shows strong correlations with the number of subhalo member galaxies, velocity dispersion, and dynamical mass of subhalos with power-law slopes of 0.54_-0.15_^+0.16^, 0.93_-0.32_^+0.35^, and 0.50_-0.18^+0.31^, respectively. The slope of the mass-velocity dispersion relation of the weak-lensing subhalos appears shallower than that of galaxy clusters, galaxy groups, and individual galaxies. These results suggest that the combination of redshift surveys with weak-lensing maps can be a powerful tool for better understanding the nature of subhalos in clusters.2025ApJS..278...51Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/278/51CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/86 : Groups of Galaxies. I. Nearby Groups (Huchra+ 1982)VII/158 : Revised and Updated Catalog of Quasi-stellar Objects (Hewitt+ 1993)VII/200 : Minislice at the North Galactic Pole. II. (Willmer+ 1996)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)III/286 : APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)VII/292 : DESI Legacy Imaging Surveys DR8 photometric redshifts (Duncan, 2022)V/161 : DESI DR1 redshift catalog (DESI Col.+ 2025)II/388 : Euclid final merged catalog. Q1 data release (Euclid Coll., 2025)J/ApJS/109/45 : Kitt Peak galaxy redshift survey (Munn+ 1997)J/MNRAS/300/303 : UV-selected galaxy redshift survey (Treyer+, 1998)J/MNRAS/312/442 : UV-selected galaxy redshift survey. II. (Sullivan+, 2000)J/AJ/121/2331 : SDSS redshifts in the Coma cluster (Castander+, 2001)J/AJ/121/66 : KISS H{alpha} survey list 1 (Salzer+, 2001)J/AJ/130/496 : KISS emission-line galaxy candidates (Jangren+, 2005)J/A+A/469/1211 : XMM-Newton survey of SA 57 (Trevese+, 2007)J/ApJS/191/254 : GMBCG galaxy cluster catalog from SDSS DR7 (Hao+, 2010)J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/AJ/142/148 : IR obs. of galaxies in the Coma cluster (Edwards+, 2011)J/A+A/544/A81 : Supernovae and their hosts in the SDSS DR8 (Hakobyan+, 2012)J/ApJ/767/15 : Hectospec Cluster Survey (HeCS) (Rines+, 2013)J/A+A/558/A75 : 2XMMi/SDSS Galaxy Cluster Survey. II. (Takey+, 2013)J/ApJ/783/52 : Redshifts in the field of A383 (Geller+, 2014)J/ApJS/213/35 : SHELS: galaxy redshift survey for R<=20.6 (Geller+, 2014)J/ApJ/797/106 : Redshifts in nine galaxy cluster fields (Hwang+, 2014)J/ApJ/792/45 : SPT-SZ survey galaxy clusters optical sp. (Ruel+, 2014)J/ApJ/785/104 : redMaPPer. I. Algorithm applied to SDSS DR8 (Rykoff+, 2014)J/ApJS/217/27 : Morphologies of z<0.01 SDSS-DR7 galaxies (Ann+, 2015)J/ApJ/807/178 : Rich galaxy clusters identified in SDSS-DR12 (Wen+, 2015)J/ApJS/224/11 : SHELS: redshift survey of the F1 DLS field (Geller+, 2016)J/ApJ/819/63 : Hectospec survey of SZ clusters (HeCS-SZ) (Rines+, 2016)J/ApJ/836/99 : NuSTAR serendipitous survey: 40-month cat. (Lansbury+, 2017)J/MNRAS/468/3322 : CoMaLit. V. Mass forecasting with proxies (Sereno+, 2017)J/ApJS/229/20 : MMT/Hectospec redshift survey for Abell 2029 (Sohn+, 2017)J/ApJ/861/49 : ALFALFA extragalactic HI source catalog (Haynes+, 2018)J/ApJ/863/102 : Spectroscopic redshift catalog in A2142 field (Liu+, 2018)J/ApJS/240/6 : LAMOST Quasar Survey: Data Releases 4 and 5 (Yao+, 2019)J/ApJ/891/129 : The HeCS-omnibus catalog: SDSS & MMT sp. obs. (Sohn+, 2020)J/A+A/650/A76 : HI content in Coma cluster substructure (Healy+, 2021)J/ApJS/267/16 : Strong [OIII]5007 emission-line compact gal. (Liu+, 2023)J/ApJS/267/27 : SMUDGes V. Complete cat. of UDGs from DR9 (Zaritsky+, 2023)J/ApJS/272/22 : Gal. with redshifts in the vicinity of A426 (Kang+, 2024)J/A+A/694/A216 : Catalog of Coma cluster members (Jimenez-Teja+, 2025)http://www.sdss.org/ : SDSS homepagehttp://www.desi.lbl.gov/ : DESI homepagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/278/51https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/278/51http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/278/51https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/278/51https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/278/51http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/278/51GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/278/51/table2 (Redshift catalog of objects within 132' of the Coma cluster center)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/278/51/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/278/51/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/278/51/table2?GETtext/xml+votable180.050000true192.5067588928.021603890.0055555555555555565/2594-2595 2600-2601 6/10370-10371 10374 10408-10409 28119 28125-28127 28148-28149 28151 28157https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/278/51?format=asciiOpticaldefaultJ/ApJS/278/51/table2Redshift catalog of objects within 132' of the Coma cluster centerrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/37758] Sequence numbermeta.idintObjIDObjID in SDSS catalogmeta.id;meta.mainRAJ2000[192.5/197.5] Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[25.8/30.2] Declination (J2000)degpos.eq.dec;meta.mainindexedrmag[11.68/23.15] Apparent extinction corrected r-band Petrosian magnitudemagphot.mag;em.opt.RfloatPS[0/1]? Flag for point source (1)meta.codeintnullablez[-0.0041/5.64] Redshiftsrc.redshiftdoublee_z[0/3.5] Uncertainty in zstat.error;src.redshiftdoubler_z[1/44] Reference for z (1=this work (2194 occurrences); see refs.dat file)meta.ref;src.redshiftintMm[0/1]? Flag for cluster membership; Section 2.3 (2)meta.code.memberintnullableSloanDisplay the online SDSS DR17 data for this objectmeta.ref.urlcharJ/ApJS/278/51/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.noteintAuthFirst author's name(s)meta.bib.authorcharBibCodeBibcode of the referencemeta.bib.bibcodecharCommCommentmeta.notechar