J/ApJS/196/11ivo://CDS.VizieR/J/ApJS/196/11doi:10.26093/cds/vizier.21960011CDSSimard L.Trevor Mendel J.Patton D.R.Ellison S.L.McConnachie A.W.2017-04-26T12:35:22Z2012-01-05T23:09:29ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomysloan-photometrystellar-evolutionary-modelssurveyscatalogsgalaxy-classification-systemsWe perform two-dimensional, point-spread-function-convolved, bulge+disk decompositions in the g and r bandpasses on a sample of 1123718 galaxies from the Legacy area of the Sloan Digital Sky Survey Data Release Seven. Four different decomposition procedures are investigated which make improvements to sky background determinations and object deblending over the standard SDSS procedures that lead to more robust structural parameters and integrated galaxy magnitudes and colors, especially in crowded environments. We use a set of science-based quality assurance metrics, namely, the disk luminosity-size relation, the galaxy color-magnitude diagram, and the galaxy central (fiber) colors to show the robustness of our structural parameters. The best procedure utilizes simultaneous, two-bandpass decompositions. Bulge and disk photometric errors remain below 0.1mag down to bulge and disk magnitudes of g~19 and r~18.5. We also use and compare three different galaxy fitting models: a pure Sersic model, an n_b_=4 bulge+disk model, and a Sersic (free n_b_) bulge+disk model. The most appropriate model for a given galaxy is determined by the F-test probability. All three catalogs of measured structural parameters, rest-frame magnitudes, and colors are publicly released here.2011ApJS..196...11Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/196/11CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/ApJS/173/293 : UV-Optical galaxy color-magnitude diagram I. (Wyder+, 2007)J/A+A/415/63 : UBVRI surface brightness of 26 bright galaxies (Mollenhoff,J/AJ/127/704 : Low surface brightness galaxies in SDSS (Kniazev+, 2004)J/AJ/116/1626 : Spiral and lenticular galaxy brightness profiles (Baggett+,https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/196/11https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/196/11http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/196/11https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/196/11https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/196/11http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/196/11GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/196/11/table1 (SDSS structural parameters from n=4 bulge+disk decompositions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/196/11/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/196/11/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/196/11/table1?GETtext/xml+votable180.050000true236.2470961-0.47526390.005555555555555556Cone search capability for table J/ApJS/196/11/table2 (SDSS structural parameters from free n_b_ bulge+disk decompositions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/196/11/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/196/11/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/196/11/table2?GETtext/xml+votable180.050000true236.2470961-0.47526390.005555555555555556Cone search capability for table J/ApJS/196/11/table3 (SDSS structural parameters from pure Sersic decompositions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/196/11/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/196/11/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/196/11/table3?GETtext/xml+votable180.050000true236.2470961-0.47526390.0055555555555555561/5 8 10 27 2/16 17 19 25 28 36 38 103 107 3/72 73 75 97 116 150 176 177 178 184 407 409 410 411 421 423 427 491 494 506 4/296 297 299 385 399 468 469 472 592 594 595 607 624 626 629 631 632 634 637 716 718 720 722 724 740 744 745 746 1193 1365 1366 1367 1373 1375 1397 1399 1450 1599 1621 1622 1623 1625 1626 1627 1635 1690 1691 1701 1702 1703 1705 1706 1707 1961 1962 1963 1980 1982 1983 2031 2042 5/0 131 136 137 138 1192 1193 1195 1548 1549 1551 1585 1588 1589 1593 1684 1685 1728 1729 1732 1733 1880 1881 1882 1884 1896 1897 1898 1900 1901 2372 2374 2375 2389 2391 2397 2399 2421 2423 2500 2501 2502 2508 2510 2515 2521 2523 2532 2534 2540 2542 2545 2547 2553 2555 2556 2558 2868 2869 2870 2876 2878 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49077 49078 49079 49081 49091 49108 49112 49114 49124 49125 49126 49147https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/196/11?format=asciiOpticaldefaultJ/ApJS/196/11/table1SDSS structural parameters from n=4 bulge+disk decompositionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintobjIDSDSS "objID" object identifier (run, rerun, camcol, field, object)meta.idindexedz? SDSS redshift (spectroscopic if available; or photometric ("-1" in "Sp")src.redshiftfloatnullableSp[-2/6] SDSS SpecClass value (G1)meta.code.classintScale? Physical scale at redshift zkpc/arcsecinstr.scalefloatnullableVmax? Galaxy volume correction (Eq. 7)Mpc**3arith.factordoublenullablegg2d? GIM2D B+D model g-band magnitude; (Eq. 1)magphot.mag;meta.modelledfloatnullablee_gg2d? Uncertainty in gg2dmagphot.mag;meta.modelledfloatnullablerg2d? GIM2D B+D model r-band magnitude; (Eq. 1)magphot.mag;meta.modelledfloatnullablee_rg2d? Uncertainty in rg2dmagphot.mag;meta.modelledfloatnullablegg2df? B+D model g-band fiber magnitudemagphot.mag;meta.modelledfloatnullablerg2df? B+D model r-band fiber magnitudemagphot.mag;meta.modelledfloatnullabledCol[-4.60,+3.83]? Delta fiber color (G2)magphot.magfloatnullable(B/T)g[0,1]? g-band bulge fractionphot.mag.sb;arith.ratiofloatnullablee_(B/T)g[0,1]? Uncertainty in (B/T)gstat.errorfloatnullable(B/T)r[0,1]? r-band bulge fractionphot.mag.sb;arith.ratiofloatnullablee_(B/T)r[0,1]? Uncertainty in (B/T)rstat.errorfloatnullable(B/T)gf? g-band fiber bulge fractionphot.mag.sb;arith.ratiofloatnullable(B/T)rf? r-band fiber bulge fractionphot.mag.sb;arith.ratiofloatnullableRhlg[0,1488]? g-band galaxy semi-major axis, half-light radiuskpcphys.size.smajAxis;src.orbitalfloatnullableRhlr[0,1488]? r-band galaxy semi-major axis, half-light radiuskpcphys.size.smajAxis;src.orbitalfloatnullableRchl_g[-336,308] g-band galaxy circular half-light radiuskpcphys.size.radiusfloatRchl_r[-336,287] r-band galaxy circular half-light radiuskpcphys.size.radiusfloatRe? Bulge semi-major effective radiuskpcphys.size.radiusfloatnullablee_Re? Uncertainty in Rekpcstat.errorfloatnullablee[0,1]? Bulge ellipticity (G3)src.ellipticityfloatnullablee_e[0,1]? Uncertainty in estat.errorfloatnullablephib[-360,360] Bulge position angle (G4)degpos.posAngfloate_phib? Uncertainty in phibdegstat.errorfloatnullableRd? Exponential disk scale lengthkpcphys.angSize;srcfloatnullablee_Rd? Uncertainty in Rdkpcstat.errorfloatnullablei? Disk inclination angle (1)degsrc.orbital.inclination;pos.posAngfloatnullablee_i? Uncertainty in idegstat.errorfloatnullablephid[-360,360] Disk position angle (G4)degpos.posAngfloate_phid? Uncertainty in phiddegstat.errorfloatnullable(dx)g? g-band B+D model center X offset (G5)arcsecstat.fit.paramfloatnullablee_(dx)g? Uncertainty in (dx)garcsecstat.errorfloatnullable(dy)g? g-band B+D model center Y offset (G5)arcsecstat.fit.paramfloatnullablee_(dy)g? Uncertainty in (dy)garcsecstat.errorfloatnullable(dx)r? r-band B+D model center X offset (G5)arcsecstat.fit.paramfloatnullablee_(dx)r? Uncertainty in (dx)rarcsecstat.errorfloatnullable(dy)r? r-band B+D model center Y offset (G5)arcsecstat.fit.paramfloatnullablee_(dy)r? Uncertainty in (dy)rarcsecstat.errorfloatnullableS2g? g-band image smoothness parameter (G6)stat.fit.paramfloatnullableS2r? r-band image smoothness parameter (G6)stat.fit.paramfloatnullableggMag? Absolute, rest-frame g-band GIM2D galaxy magnitude (Eq. 3a)magphys.magAbsfloatnullablee_ggMag? Uncertainty in ggMagmagstat.error;phot.magfloatnullablegbMag? Absolute, rest-frame g-band GIM2D bulge magnitude (Eq. 3c)magphys.magAbsfloatnullablee_gbMag? Uncertainty in gbMagmagstat.error;phot.magfloatnullablegdMag? Absolute, rest-frame g-band GIM2D disk magnitude (Eq. 3e)magphys.magAbsfloatnullablee_gdMag? Uncertainty in gdMagmagstat.error;phot.magfloatnullablergMag? Absolute, rest-frame r-band GIM2D galaxy magnitude (Eq. 3b)magphys.magAbsfloatnullablee_rgMag? Uncertainty in rgMagmagstat.error;phot.magfloatnullablerbMag? Absolute, rest-frame r-band GIM2D bulge magnitude (Eq. 3d)magphys.magAbsfloatnullablee_rbMag? Uncertainty in rbMagmagstat.error;phot.magfloatnullablerdMag? Absolute, rest-frame r-band GIM2D disk magnitude (Eq. 3f)magphys.magAbsfloatnullablee_rdMag? Uncertainty in rdMagmagstat.error;phot.magfloatnullablenb[0,8]? Bulge Sersic index (4.00 for table 1)stat.fit.paramfloatnullablee_nb[0,4]? Uncertainty in nb (0.00 for table 1)stat.errorfloatnullablePpS[0,1]? F-test probability (2)stat.fit.goodnessfloatnullableAllDisplay all results from the 3 modelsmeta.ref.urlcharSloanDisplay the SDSS data for this objectmeta.ref.urlcharDR7Details from the SDSS-DR7 catalog (II/294)meta.ref.urlchar_RAPositions from SDSS-DR7 (Cat. II/294) (right ascension part)degpos.eq.ra;meta.mainindexed_DEPositions from SDSS-DR7 (Cat. II/294) (declination part)degpos.eq.dec;meta.mainindexedJ/ApJS/196/11/table2SDSS structural parameters from free n_b_ bulge+disk decompositions(B/T)r[0,1]? r-band bulge fractionphot.mag.sb;arith.ratiofloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintobjIDSDSS "objID" object identifier (run, rerun, camcol, field, object)meta.idindexedz? SDSS redshift (spectroscopic if available; or photometric ("-1" in "Sp")src.redshiftfloatnullableSp[-2/6] SDSS SpecClass value (G1)meta.code.classintScale? Physical scale at redshift zkpc/arcsecinstr.scalefloatnullableVmax? Galaxy volume correction (Eq. 7)Mpc**3arith.factordoublenullablegg2d? GIM2D B+D model g-band magnitude; (Eq. 1)magphot.mag;meta.modelledfloatnullablee_gg2d? Uncertainty in gg2dmagphot.mag;meta.modelledfloatnullablerg2d? GIM2D B+D model r-band magnitude; (Eq. 1)magphot.mag;meta.modelledfloatnullablee_rg2d? Uncertainty in rg2dmagphot.mag;meta.modelledfloatnullablegg2df? B+D model g-band fiber magnitudemagphot.mag;meta.modelledfloatnullablerg2df? B+D model r-band fiber magnitudemagphot.mag;meta.modelledfloatnullabledCol[-4.60,+3.83]? Delta fiber color (G2)magphot.magfloatnullable(B/T)g[0,1]? g-band bulge fractionphot.mag.sb;arith.ratiofloatnullablee_(B/T)g[0,1]? Uncertainty in (B/T)gstat.errorfloatnullablee_(B/T)r[0,1]? Uncertainty in (B/T)rstat.errorfloatnullable(B/T)gf? g-band fiber bulge fractionphot.mag.sb;arith.ratiofloatnullable(B/T)rf? r-band fiber bulge fractionphot.mag.sb;arith.ratiofloatnullableRhlg[0,1488]? g-band galaxy semi-major axis, half-light radiuskpcphys.size.smajAxis;src.orbitalfloatnullableRhlr[0,1488]? r-band galaxy semi-major axis, half-light radiuskpcphys.size.smajAxis;src.orbitalfloatnullableRchl_g[-336,308] g-band galaxy circular half-light radiuskpcphys.size.radiusfloatRchl_r[-336,287] r-band galaxy circular half-light radiuskpcphys.size.radiusfloatRe? Bulge semi-major effective radiuskpcphys.size.radiusfloatnullablee_Re? Uncertainty in Rekpcstat.errorfloatnullablee[0,1]? Bulge ellipticity (G3)src.ellipticityfloatnullablee_e[0,1]? Uncertainty in estat.errorfloatnullablephib[-360,360] Bulge position angle (G4)degpos.posAngfloate_phib? Uncertainty in phibdegstat.errorfloatnullableRd? Exponential disk scale lengthkpcphys.angSize;srcfloatnullablee_Rd? Uncertainty in Rdkpcstat.errorfloatnullablei? Disk inclination angle (1)degsrc.orbital.inclination;pos.posAngfloatnullablee_i? Uncertainty in idegstat.errorfloatnullablephid[-360,360] Disk position angle (G4)degpos.posAngfloate_phid? Uncertainty in phiddegstat.errorfloatnullable(dx)g? g-band B+D model center X offset (G5)arcsecstat.fit.paramfloatnullablee_(dx)g? Uncertainty in (dx)garcsecstat.errorfloatnullable(dy)g? g-band B+D model center Y offset (G5)arcsecstat.fit.paramfloatnullablee_(dy)g? Uncertainty in (dy)garcsecstat.errorfloatnullable(dx)r? r-band B+D model center X offset (G5)arcsecstat.fit.paramfloatnullablee_(dx)r? Uncertainty in (dx)rarcsecstat.errorfloatnullable(dy)r? r-band B+D model center Y offset (G5)arcsecstat.fit.paramfloatnullablee_(dy)r? Uncertainty in (dy)rarcsecstat.errorfloatnullableS2g? g-band image smoothness parameter (G6)stat.fit.paramfloatnullableS2r? r-band image smoothness parameter (G6)stat.fit.paramfloatnullableggMag? Absolute, rest-frame g-band GIM2D galaxy magnitude (Eq. 3a)magphys.magAbsfloatnullablee_ggMag? Uncertainty in ggMagmagstat.error;phot.magfloatnullablegbMag? Absolute, rest-frame g-band GIM2D bulge magnitude (Eq. 3c)magphys.magAbsfloatnullablee_gbMag? Uncertainty in gbMagmagstat.error;phot.magfloatnullablegdMag? Absolute, rest-frame g-band GIM2D disk magnitude (Eq. 3e)magphys.magAbsfloatnullablee_gdMag? Uncertainty in gdMagmagstat.error;phot.magfloatnullablergMag? Absolute, rest-frame r-band GIM2D galaxy magnitude (Eq. 3b)magphys.magAbsfloatnullablee_rgMag? Uncertainty in rgMagmagstat.error;phot.magfloatnullablerbMag? Absolute, rest-frame r-band GIM2D bulge magnitude (Eq. 3d)magphys.magAbsfloatnullablee_rbMag? Uncertainty in rbMagmagstat.error;phot.magfloatnullablerdMag? Absolute, rest-frame r-band GIM2D disk magnitude (Eq. 3f)magphys.magAbsfloatnullablee_rdMag? Uncertainty in rdMagmagstat.error;phot.magfloatnullablenb[0,8]? Bulge Sersic index (4.00 for table 1)stat.fit.paramfloatnullablee_nb[0,4]? Uncertainty in nb (0.00 for table 1)stat.errorfloatnullablePpS[0,1]? F-test probability (2)stat.fit.goodnessfloatnullablePn4[0,1]? F-test probability (only for table 2) (3)stat.fit.goodnessfloatnullableAllDisplay all results from the 3 modelsmeta.ref.urlcharSloanDisplay the SDSS data for this objectmeta.ref.urlcharDR7Details from the SDSS-DR7 catalog (II/294)meta.ref.urlchar_RAPositions from SDSS-DR7 (Cat. II/294) (right ascension part)degpos.eq.ra;meta.mainindexed_DEPositions from SDSS-DR7 (Cat. II/294) (declination part)degpos.eq.dec;meta.mainindexedJ/ApJS/196/11/table3SDSS structural parameters from pure Sersic decompositionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintobjIDSDSS object identifiermeta.idindexedz? SDSS redshift (spectroscopic if available or photometric ("-1" in "Sp")src.redshiftfloatnullableSp[-2/6] SDSS SpecClass value (G1)meta.code.classintScale? Physical scale at redshift zkpc/arcsecinstr.scalefloatnullableVmax? Galaxy volume correction (Eq. 7)Mpc**3arith.factordoublenullablegg2d? GIM2D pure Sersic model g-band magnitudemagphot.mag;meta.modelledfloatnullablee_gg2d? Uncertainty in gg2dmagphot.mag;meta.modelledfloatnullablerg2d? GIM2D pure Sersic model r-band magnitudemagphot.mag;meta.modelledfloatnullablee_rg2d? Uncertainty in rg2dmagphot.mag;meta.modelledfloatnullablegg2df? GIM2D pure Sersic model g-band fiber magnitudemagphot.mag;meta.modelledfloatnullablerg2df? GIM2D pure Sersic model r-band fiber magnitudemagphot.mag;meta.modelledfloatnullabledCol[-4.95,+5.73]? Delta fiber color (G2)magphot.magfloatnullableRhlg? g-band galaxy semi-major axis, half-light radiuskpcphys.size.smajAxis;src.orbitalfloatnullableRhlr? r-band galaxy semi-major axis, half-light radiuskpcphys.size.smajAxis;src.orbitalfloatnullableRchl_g[-336,284] g-band galaxy circular half-light radiuskpcphys.size.radiusfloatRchl_r[-336,284] r-band galaxy circular half-light radiuskpcphys.size.radiusfloate? Galaxy ellipticiy (G3)src.ellipticityfloatnullablee_e? Uncertainty in estat.errorfloatnullablephi[-360,360] Galaxy position angle (G4)degpos.posAngfloate_phi? Uncertainty in phidegstat.errorfloatnullable(dx)g[-42,32]? g-band pure Sersic model center X offset (G5)arcsecstat.fit.paramfloatnullablee_(dx)g? Uncertainty in (dx)garcsecstat.errorfloatnullable(dy)g[-38,30]? g-band pure Sersic model center Y offset (G5)arcsecstat.fit.paramfloatnullablee_(dy)g? Uncertainty in (dy)garcsecstat.errorfloatnullable(dx)r[-31,30]? r-band pure Sersic model center X offset (G5)arcsecstat.fit.paramfloatnullablee_(dx)r? Uncertainty in (dx)rarcsecstat.errorfloatnullable(dy)r[-38,30]? r-band pure Sersic model center Y offset (G5)arcsecstat.fit.paramfloatnullablee_(dy)r? Uncertainty in (dy)rarcsecstat.errorfloatnullableS2g[-89,98]? g-band image smoothness parameter (G6)stat.fit.paramfloatnullableS2r[-75,99]? r-band image smoothness parameter (G6)stat.fit.paramfloatnullableggMag[-37,7]? Absolute, rest-frame g-band GIM2D galaxy magnitude (Eq. 3a)magphys.magAbsfloatnullablee_ggMag? Uncertainty in ggMagmagstat.error;phot.magfloatnullablergMag[-36,6]? Absolute, rest-frame r-band GIM2D galaxy magnitude (Eq. 3b)magphys.magAbsfloatnullablee_rgMag? Uncertainty in rgMagmagstat.error;phot.magfloatnullableng[0,8]? Galaxy Sersic indexstat.fit.paramfloatnullablee_ng? Uncertainty in ngstat.errorfloatnullableAllDisplay all results from the 3 modelsmeta.ref.urlcharSloanDisplay the SDSS data for this objectmeta.ref.urlcharDR7Details from the SDSS-DR7 catalog (II/294)meta.ref.urlchar_RAPositions from SDSS-DR7 (Cat. II/294) (right ascension part)degpos.eq.ra;meta.mainindexed_DEPositions from SDSS-DR7 (Cat. II/294) (declination part)degpos.eq.dec;meta.mainindexed