J/MNRAS/493/1686ivo://CDS.VizieR/J/MNRAS/493/1686doi:10.26093/cds/vizier.74931686CDSLuo Y.Faber S.M.Rodriguez-Puebla A.Woo J.Guo Y.Koo D.C.,Primack J.R.Chen Z.Yesuf H.M.Lin L.Barro G.Fang J.J.Pandya V.,Huertas-Company M.Mao S.2024-08-20T20:16:10Z2023-07-05T13:48:43ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyastrometryThis paper studies pseudo-bulges (P-bulges) and classical bulges (C-bulges) in Sloan Digital Sky Survey (SDSS) central galaxies using the new bulge indicator {Delta}{Sigma}_1_, which measures relative central stellar-mass surface density within 1kpc. We compare {Delta}{Sigma}_1_ to the established bulge-type indicator {Delta}<{mu}_e_> from Gadotti (2009MNRAS.393.1531G, Cat. J/MNRAS/393/1531) and show that classifying by {Delta}{Sigma}_1_ agrees well with {Delta}<{mu}_e_>. {Delta}{Sigma}_1_ requires no bulge-disc decomposition and can be measured on SDSS images out to z=0.07. Bulge types using it are mapped on to 20 different structural and stellar-population properties for 12000 SDSS central galaxies with masses 10.0<logM_*_/M_{sun}_<10.4. New trends emerge from this large sample. Structural parameters show fairly linear log-log relations versus {Delta}{Sigma}_1_ and {Delta}<{mu}_e_> with only moderate scatter, while stellar-population parameters show a highly non-linear 'elbow' in which specific star formation rate remains roughly flat with increasing central density and then falls rapidly at the elbow, where galaxies begin to quench. P-bulges occupy the low-density end of the horizontal arm of the elbow and are universally star forming, while C-bulges occupy the elbow and the vertical branch and exhibit a wide range of star formation rates at a fixed density. The non-linear relation between central density and star formation rate has been seen before, but this mapping on to bulge class is new. The wide range of star formation rates in C-bulges helps to explain why bulge classifications using different parameters have sometimes disagreed in the past. The elbow-shaped relation between density and stellar indices suggests that central structure and stellar populations evolve at different rates as galaxies begin to quench.2020MNRAS.493.1686Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/493/1686CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/493/1686https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/493/1686http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/493/1686https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/493/1686https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/493/1686http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/493/1686GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/493/1686/tableb1 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31353-31355 31357-31359 31363 31365-31367 31369-31371 31388-31389 31408 31413-31415 31417-31419 31424 31426 31429-31431 31433-31435 31488 31548 31550-31551 31594 31598 31620-31622 31632-31634 31736-31737 31739 32391 32397 32399 32402-32403 32406-32407 32421-32423 32427 32460 32462 32478 32484 32486 32492 32494 32497 32672 32674 32680 32682-32683 36607 36703 36715 36717-36719 36722-36725 36727-36730 36732-36734 36759 36761-36763 36771 36773-36775 36777-36779 36788-36790 36792-36794 36812 36816-36818 36861-36863 40957 40959 45023 45039 48983 49005 49007 49009-49011 49020-49022 49077-49079 49100-49102 49112 49124 49128-49130 49147 49149-49151https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/493/1686?format=asciiOpticaldefaultJ/MNRAS/493/1686/tableb1entries from the {Sigma}_1_ catalogue for SDSS DR7 galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000)degpos.eq.dec;meta.mainindexedIDSDSS unique object identifier (objID)meta.id;meta.mainlogS1Logarithm of the stellar mass surface density within 1 kpclog(solMass.kpc**-2)phys.densitydouble