J/A+A/366/68ivo://CDS.VizieR/J/A+A/366/68doi:10.26093/cds/vizier.33660068CDSPrugniel P.Maubon G.Simien F.2006-02-04T15:12:30Z2006-02-04T16:11:41ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyspectrophotometryWe have measured Mg_2_, Fe5270 and Fe5335 spectrophotometric indices (LICK system) in the bulge of 89 galaxies, mostly spirals from the Heraudeau sample. The indices are reduced to a null velocity dispersion and normalized to an aperture of 0.2h^-1^kpc. The mean errors are 0.009 mag on Mg_2_, and 0.3{AA} on the iron indices. These measurements almost double the amount of similar data already available on spiral galaxies. Our data confirm the existence of the relation between Mg_2_ and sigma_0_, the central stellar velocity dispersion; and we find an even tighter relation between Mg_2_ and Vmaxrot, the maximum rotational velocity of the galaxy, deduced from HI observations. For the most massive bulges these correlations may be interpreted as a mass-metallicity relation. However, the presence of young stellar populations, traced by the detection of [OIII]{lambda}500.7nm emission, provides a clear evidence that age effects play a role. Since the contribution of the young population is anti-correlated with the mass of the galaxy, it continues the Mg_2_ vs. sigma_0_ relation toward the low sigma_0_ and globally increases its slope. We present also evidence for a new positive correlation between Fe indices and sigma_0_ and for a significant correlation between the line strength indices and the total or disk luminosity. We propose to model the whole sequence of bulges within the following framework: Bulges are composed of a primary population formed prior to the disk during the initial collapse and a secondary population formed along the evolution. The whole family of bulges can be classified in three classes: (A) The bulges dominated by a young population are generally small, have ionized gas, low velocity dispersion and low line strengths. (B) The bulges dominated by the primary population lie along the mass metallicity sequence defined for elliptical galaxies. (C) The bulges where the secondary population is significant are less Mg-overabundant than B-type bulges and deviate from the Mg_2_ vs. sigma_0_ relation of elliptical galaxies. The original data are available in Hypercat: http://www-obs.univ-lyon1.fr/hypercat The tables of measurements and the extracted 1D spectra are also available in the present archive set.2001A&A...366...68Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/366/68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www-obs.univ-lyon1.fr/hypercat/ : the HYPERCAT databaseJ/A+AS/132/255 : A catalogue of Mg_2_ indices (Golev+ 1998)J/A+AS/136/519 : Central Mg_2_ indices for early-type galaxies (Golev+ 1999)J/A+AS/133/317 : Stellar kinematics in spiral galaxies. I. (Heraudeau+ 1998)J/A+AS/136/509 : Stellar kinematics in spiral galaxies. II. (Heraudeau+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/366/68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/366/68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/366/68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/366/68https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/366/68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/366/68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/366/68/table1 (Catalog elements and final measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/366/68/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/366/68/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/366/68/table1?GETtext/xml+votable180.050000true61.94597569.8128320.0055555555555555566/11 177 611 697 909 1707 2155 2333 2709 3073 3085 3511 3517 3862 3906 4167 4328 4405 4439 4447 4511 4803 5183 5244 5306 5342 5463 5572 5581 5596 5634 5639 5774 5799 5976 5978 5982 6154 6448 7030 7137 7177 7241 7355 7386 7457 7602 7606 7743 7882 7957 7982 7986 8042 8106 8129 10475 10841 10977 12619 13522 18209 18324 18689 19576 19697 19940 20090 21959 22644 23887 25083 26090 26303 26365 27426 27512 27603 27738 27828 27863 27914 27945 28015 28123 28167 28299 28348 36632https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/366/68?format=asciiOpticaldefaultJ/A+A/366/68/table1Catalog elements and final measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNormalized galaxy identifiercharprimaryRA1950? Right Ascension 1950pos.eq.ra;meta.mainnullableDE1950? Declination 1950pos.eq.dec;meta.mainnullableMTypeMorphological type (from PGC96)charVdistDistance velocity (from Hypercat)km/sfloatVmrotMaximum velocity of rotation (from PGC96)km/sintSig0Central velocity dispersion (from Hypercat)km/sintR6R6 radius projected on minor axiskpcfloatNobsNumber of individual observationsintMg2Fully corrected Mg_2_ indexmagfloate_Mg2Error on Mg2magfloatOIIIOIII (5007) equivalent width0.1nmfloate_OIII? Formal fit error on OIII0.1nmfloatnullableFe5270? Iron 5270 index0.1nmfloatnullablee_Fe5270? error on Fe52700.1nmfloatnullableFe5335? Iron 5335 index0.1nmfloatnullablee_Fe5335? error on Fe53350.1nmfloatnullableFe? Combined Iron index0.1nmfloatnullablee_Fe? error on Fe0.1nmfloatnullableJ/A+A/366/68/table3Individual measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFaidIdentification of observationcharFileNameSpectra file name in "fits" subdirectorycharNameNormalized galaxy identifiercharVhelHeliocentric cz from Hypercatkm/sfloatMg2Measured Mg_2_ indexmagfloate_Mg2Uncertainty of Mg_2_ indexmagfloatOIIIOIII 5007 A Equivalent width0.1nmfloate_OIII? Uncertainty on OIII0.1nmfloatnullableFe5270Uncorrected measured Fe5270 index0.1nmfloate_Fe5270Error on Fe52700.1nmfloatFe5335Uncorrected measured Fe5335 index0.1nmfloate_Fe5335Error on Fe53350.1nmfloat