J/MNRAS/453/3729ivo://CDS.VizieR/J/MNRAS/453/3729doi:10.26093/cds/vizier.74533729CDSHead J.T.C.G.Lucey J.R.Hudson M.J.2024-08-15T20:15:26Z2016-08-23T13:52:27ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometrygalaxy-classification-systemsGalaxies are not limited to simple spheroid or bulge + disc morphologies. We explore the diversity of internal galaxy structures in the Coma Cluster across a wide range of luminosities (-17>Mg>-22) and cluster-centric radii (0<r_cluster_<1.3r_200_) through analysis of deep Canada-France-Hawaii Telescope i-band imaging. We present 2D multicomponent decomposition via galfit, encompassing a wide range of candidate model morphologies with up to three photometric components. Particular focus is placed on early-type galaxies with outer discs (i.e. S0s), and deviations from simple ('unbroken') exponential discs. Rigorous filtering ensures that each model component provides a statistically significant improvement to the goodness-of-fit. The majority of Coma Cluster members in our sample (478 of 631) are reliably fitted by symmetric structural models. Of these, 134 (28 percent) are single Sersic objects, 143 (30 percent) are well-described by 2-component structures, while 201 (42 percent) require more complex models. Multicomponent Sersic galaxies resemble compact pseudo-bulges (n~2, R_e_~4kpc) surrounded by extended Gaussian-like outer structures (R_e_>10kpc). 11 percent of galaxies (N=52) feature a break in their outer profiles, indicating 'truncated' or 'antitruncated' discs. Beyond the break radius, truncated galaxies are structurally consistent with exponential discs, disfavouring physical truncation as their formation mechanism. Bulge luminosity in antitruncated galaxies correlates strongly with galaxy luminosity, indicating a bulge-enhancing origin for these systems. Both types of broken disc are found overwhelmingly (>70 percent) in 'barred' galaxies, despite a low measured bar fraction for Coma (20+/-2 percent). Thus, galaxy bars play an important role in formation of broken disc structures. No strong variation in galaxy structure is detected with projected cluster-centric radius.2015MNRAS.453.3729Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/453/3729CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/440/1690 : Bulge and disc colours of ETG in Coma (Head+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/453/3729https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/453/3729http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/453/3729https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/453/3729https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/453/3729http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/453/3729GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/453/3729/tablec1 (The structural and photometric parameters of multicomponent models fits (i band) for the entire galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/453/3729/tablec1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/453/3729/tablec1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/453/3729/tablec1?GETtext/xml+votable180.050000true194.87528.70.0055555555555555565/2594 2600 6/10380 10382-10383 10404 28127 28149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/453/3729?format=asciiOpticaldefaultJ/MNRAS/453/3729/tablec1The structural and photometric parameters of multicomponent models fits (i band) for the entire galaxy sampleSimbadNameSimbad column added by the CDSmeta.idchariMAG1Component 1 (exponential disk) rest-frame total i-band magnitudemagphot.mag;em.opt.IfloatIDSDSS DR8 object IDmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzSDSS redshiftsrc.redshiftfloatiMAGTotal rest-frame i-band magnitudemagphot.mag;em.opt.IfloatRtotUpper limit total half-light radius (exponential scalelength)kpcphys.size.radius;stat.maxfloatR1Component 1 (exponential disk) half-light radius (exponential scalelengthkpcphys.size.radiusfloatn1Component 1 (exponential disk) Sersiec indexstat.fit.paramfloatq1Component 1 (exponential disk) axis ratio (b/a)phys.size.axisRatiofloatPA1? Component 1 (exponential disk) position angledegpos.posAngfloatnullableC0? Component 1 (exponential disk) boxiness/disciness parametersrc.morph.paramfloatnullableiMAG2? Component 2 (Bulge) rest-frame total i-band magnitudemagphot.mag;em.opt.IfloatnullableR2? Component 2 (Bulge) effective half-light radiuskpcphys.size.radiusfloatnullablen2? Component 2 (Bulge) Sersic indexstat.fit.paramfloatnullableq2? Component 2 (Bulge) axis ratio (b/a)phys.size.axisRatiofloatnullablePA2? Component 2 (Bulge) position angledegpos.posAngfloatnullableiMAG3? Component 3 (boxy Sersics) rest-frame total i-band magnitudemagphot.mag;em.opt.IfloatnullableR3? Component 3 (boxy Sersics) effective half-light radiuskpcphys.size.radiusfloatnullablen3? Component 3 (boxy Sersics) sersic indexstat.fit.paramfloatnullableq3? Component 3 (boxy Sersics) axis ratio (b/a)phys.size.axisRatiofloatnullablePA3? Component 3 (boxy Sersics) position angledegpos.posAngfloatnullableRoutOuter disc half-light radius (exponential scalelengthkpcphys.size.radiusfloatRbrkDisc Break radiuskpcphys.size.radiusfloatCT1Component 1 (exponential disk) light fractionphys.composition.massLightRatiofloatCT2Component 2 (Bulge) light fractionphys.luminosity;arith.ratiofloatCT3Component 3 (boxy Sersics) light fractionphys.composition.massLightRatiofloatModBest-fitting modelstat.param;meta.modelledcharProfile[1/6] (B/D) type Allen et al. (2006MNRAS.371....2A)meta.codeintFlag[0/23] Fitting flagmeta.code.errorintSloanDisplay the SDSS data for this galaxymeta.ref.urlchar