J/MNRAS/439/1749ivo://CDS.VizieR/J/MNRAS/439/1749doi:10.26093/cds/vizier.74391749CDSLansbury G.B.Lucey J.R.Smith R.J.2024-08-08T20:12:40Z2015-03-12T16:33:37ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsvisible-astronomysloan-photometrygalaxy-classification-systemsThis study uses r-band images from the Eighth Data Release of the Sloan Digital Sky Survey (SDSS DR8) to study bars in lenticular (S0) galaxies in one of the nearest rich cluster environments, the Coma cluster. We develop techniques for bar detection and assess their success when applied to SDSS image data. To detect and characterize bars, we perform 2D bulge+disc+bar light decompositions of galaxy images with galfit. Using a sample of artificial galaxy images, we determine the faintest magnitude at which bars can be successfully measured at the depth and resolution of SDSS. We perform detailed decompositions of 83 S0 galaxies in Coma, 64 from a central sample, and 19 from a cluster outskirt sample. For the central sample, the S0 bar fraction is 72^+5^_-6_%. This value is significantly higher than that obtained using an ellipse-fitting method for bar detection, 48^+6^_-6_%. At a fixed luminosity, barred S0s are redder in g-r colour than unbarred S0s by 0.02mag. The frequency and strength of bars increase towards fainter luminosities. Neither central metallicity nor stellar age distributions differ significantly between barred and unbarred S0s. There is an increase in the bar fraction towards the cluster core, but this is at a low significance level. Bars have at most a weak correlation with cluster-centric radius.2014MNRAS.439.1749Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/439/1749CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/439/1749https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/439/1749http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/439/1749https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/439/1749https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/439/1749http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/439/1749GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/439/1749/tablea (SDSS data and morphological classifications (table A1), and bulge+disc+bar decomposition parameters (table A2) for the 83 S0s in this investigation)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/439/1749/tablea?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/439/1749/tablea?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/439/1749/tablea?GETtext/xml+votable180.050000true194.89862528.55136110.0055555555555555565/2600 6/10292 10301 10378-10379 10382 10394 10397 10404 10412-10413 10759 10769 28143 28147-28148 28153-28154 28484 284872.85864675833786e-19 3.5010283109654867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/439/1749?format=asciiOpticaldefaultJ/MNRAS/439/1749/tableaSDSS data and morphological classifications (table A1), and bulge+disc+bar decomposition parameters (table A2) for the 83 S0s in this investigationER[Y/N] Ellipse? relaxed detection (4)meta.codecharID[1/83] Galaxy ID for this study (G1)meta.id;src.class.starGalaxyintprimarySDSSSDSS DR8 identification number (objID)meta.id;meta.mainRprojProjected cluster radiusMpcphys.size.radiusfloatlogsigCentral velocity dispersion log{sigma}log(km.s**-1)phys.veloc.dispersionfloatrmagSDSS r-band magnitude using the AB systemmagphot.mag;em.opt.Rfloatg-rg-r SDSS colour indexmagphot.color;em.opt.B;em.opt.RfloatTypeThis paper Hubble type, "S0" or "SB0" (2)meta.note;src.morph.typecharTyp1Dressler (1980ApJS...42..565D, Cat. VII/174) Hubble typemeta.notecharTyp2Michard & Andreon (2008A&A...490..923M, Cat. J/A+A/490/923) Hubble typemeta.notecharES[Y/N] Ellipse? strict detection (3)meta.codecharSloanDisplay the SDSS data for this objectmeta.ref.urlcharDRFF[0/5] Change in Residual Flux Fraction (RFF) when a bar component is added to the model (see Section 2.4)%stat.fit.paramfloatB/T[5/99] Bulge light fraction%phys.luminosity;arith.ratiofloatBar/T[5/34]? Bar light fraction%phys.luminosity;arith.ratiofloatnullablerB[0.1/31] Bulge effective radiuskpcphys.size.radiusfloatrD[1/20] Disc effective radiuskpcphys.size.radiusfloatrBar[0.6/4.4]? Bar effective radiuskpcphys.size.radiusfloatnullablenB[0.4/18] Bulge Sersic indexstat.fit.paramfloatnBar[0.2/0.9]? =- Bar Sersic indexstat.fit.paramfloatnullable(b/a)B[0/1] Bulge axial ratiophys.angSize;arith.ratiofloat(b/a)D[0/1] Disc axial ratiophys.angSize;arith.ratiofloat(b/a)Bar[0/1]? Bar axial ratiophys.angSize;arith.ratiofloatnullablePAB[-90/90] Bulge position angledegpos.posAngfloatPAD[-90/90] Disc position angledegpos.posAngfloatPABar[-90/90]? Bar position angledegpos.posAngfloatnullable_RAPositions from SDSS DR (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS DR (declination part)degpos.eq.dec;meta.main