J/ApJ/787/102ivo://CDS.VizieR/J/ApJ/787/102doi:10.26093/cds/vizier.17870102CDSChaware L.Cannon R.Kembhavi A.K.Mahabal A.Pandey S.K.2017-09-04T08:02:07Z2017-07-06T09:11:13ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsvisible-astronomysloan-photometryWe report on a study of the isophotal shapes of early-type galaxies to very faint levels, reaching ~0.1% of the sky brightness. The galaxies are from the Large Format Camera (LFC) fields obtained using the Palomar 5 m Hale Telescope, with integrated exposures ranging from 1 to 4 hr in the Sloan Digital Sky Survey r, i, and z bands. The shapes of isophotes of early-type galaxies are important, as they are correlated with the physical properties of the galaxies and are influenced by galaxy formation processes. In this paper, we report on a sample of 132 E and SO galaxies in one LFC field. We have redshifts for 53 of these, obtained using AAOmega on the Anglo-Australian Telescope. The shapes of early-type galaxies often vary with radius. We derive average values of isophotal shape parameters in four different radial bins along the semi-major axis in each galaxy. We obtain empirical fitting formulae for the probability distribution of the isophotal parameters in each bin and investigate for possible correlations with other global properties of the galaxies. Our main finding is that the isophotal shapes of the inner regions are statistically different from those in the outer regions. This suggests that the outer and inner parts of early-type galaxies have evolved somewhat independently.2014ApJ...787..102Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/787/102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7J/MNRAS/327/1004 : Early-type galaxy parameters (Blakeslee+, 2001)J/AJ/125/1817 : SDSS Early-Type Galaxies Catalog (Bernardi+, 2003)J/AJ/129/2138 : Centers of early-type galaxies with HST (Lauer+, 2005)J/MNRAS/460/4492 : Nearby early-type galaxies catalog (Dabringhausen+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/787/102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/787/102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/787/102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/787/102https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/787/102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/787/102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/787/102/table1 (Basic parameters of the early-type galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/787/102/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/787/102/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/787/102/table1?GETtext/xml+votable180.050000true182.0254514-0.000140420.0055555555555555566/262812.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/787/102?format=asciiOpticaldefaultJ/ApJ/787/102/table1Basic parameters of the early-type galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLFCSExtractor identifier from this paper (LFC NNNN)meta.id;meta.mainintSDSSSDSS identifier (1)meta.idRAJ2000Right Ascension in decimal degrees (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (1)degpos.eq.dec;meta.mainumagSDSS u band magnitude (1)magphot.mag;em.opt.Ufloate_umagUncertainty in umag (1)magstat.error;phot.mag;em.opt.UfloatgmagSDSS g band magnitude (1)magphot.mag;em.opt.Bfloate_gmagUncertainty in gmag (1)magstat.error;phot.mag;em.opt.BfloatrmagSDSS r band magnitude (1)magphot.mag;em.opt.Rfloate_rmagUncertainty in rmag (1)magstat.error;phot.mag;em.opt.RfloatimagSDSS i band magnitude (1)magphot.mag;em.opt.Ifloate_imagUncertainty in imag (1)magstat.error;phot.mag;em.opt.IfloatzmagSDSS z band magnitude (1)magphot.mag;em.opt.Ifloate_zmagUncertainty in zmag (1)magstat.error;phot.mag;em.opt.IfloatR50Petrosian half-light radius (1)arcsecphys.angSize;srcfloate_R50Uncertainty in R50 (1)arcsecstat.errorfloatMajAxisSemi-major axis (2)arcsecphys.angSizefloatmuiThe i band surface brightness (2)mag.arcsec**-2phot.mag.sbfloate_muiUncertainty in muimag.arcsec**-2stat.errorfloatSNRSignal-to-Noise ratio (2)stat.snrfloatSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharJ/ApJ/787/102/table3Derived parameters for a of the LFC galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLFCSExtractor identifier from this paper (LFC NNNN) (1)meta.id;meta.mainintB/TBulge-to-total luminosity ratiophys.luminosity;arith.ratiofloat<a3/a>? Mean a_3_/a isophotal parametersrc.morph.paramdoublenullablee_<a3/a>? Uncertainty in <a3/a>stat.errordoublenullable<a4/a>? Mean a_4_/a isophotal parametersrc.morph.paramdoublenullablee_<a4/a>? Uncertainty in <a4/a>stat.errordoublenullable<epsilon>? Mean ellipticitysrc.ellipticityfloatnullablee_<epsilon>? Uncertainty in <epsilon>stat.errorfloatnullable