J/MNRAS/481/5580ivo://CDS.VizieR/J/MNRAS/481/5580doi:10.26093/cds/vizier.74815580CDSFraser-McKelvie A.Aragon-Salamanca A.Merrifield M.Tabor M.,Bernardi M.Drory N.Parikh T.Argudo-Fernandez M.2024-08-19T20:14:27Z2022-07-08T07:46:17ZCDS support team

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

cds-question@unistra.frgalaxiesgalaxy-classification-systemschemical-abundancesGas stripping of spiral galaxies or mergers are thought to be the formation mechanisms of lenticular galaxies. In order to determine the conditions in which each scenario dominates, we derive stellar populations of both the bulge and disc regions of 279 lenticular galaxies in the MaNGA survey. We find a clear bimodality in stellar age and metallicity within the population of S0s and this is strongly correlated with stellar mass. Old and metal-rich bulges and discs belong to massive galaxies, and young and metal-poor bulges and discs are hosted by low-mass galaxies. From this we conclude that the bulges and discs are co-evolving. When the bulge and disc stellar ages are compared, we find that the bulge is almost always older than the disc for massive galaxies (M_*_>10^10^M_{sun}_). The opposite is true for lower mass galaxies. We conclude that we see two separate populations of lenticular galaxies. The old, massive, and metal-rich population possess bulges that are predominantly older than their discs, which we speculate may have been caused by morphological or inside-out quenching. In contrast, the less massive and more metal-poor population have bulges with more recent star formation than their discs. We postulate they may be undergoing bulge rejuvenation (or disc fading), or compaction. Environment does not play a distinct role in the properties of either population. Our findings give weight to the notion that while the faded spiral scenario likely formed low-mass S0s, other processes, such as mergers, may be responsible for high-mass S0s.2018MNRAS.481.5580Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/481/5580CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/481/5580https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/481/5580http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/481/5580https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/481/5580https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/481/5580http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/481/5580GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/481/5580/tablea1 (Physical properties and derived quantities of the lenticular galaxies used in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/481/5580/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/481/5580/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/481/5580/tablea1?GETtext/xml+votable180.050000true42.091670.986470.0055555555555555565/2367 6/4794 4819 4825 4846-4847 4857 5118-5119 5356 5358 5360 5370 5493 5528 5533 5535 5553 5555-5556 5558 5579 5582 5592 5600-5601 5603-5604 5611-5612 5670 5680 5690 5755 5757-5758 5783 5800-5801 5803 5806 5808 5819 5824-5826 5830 5836 5841 5918-5919 5922 5929 5958 6213 6215 6217-6218 6220 6241 6244 6270-6271 6359 6367 6393 6398 6523 6535 6566 6571 6576-6578 6580 6582-6583 6586 6589 6591 6603 6606 6626 6629 6635 6637 6648 6650-6651 7172 7175 7231 7313-7315 7318 7323-7324 7360-7361 7363 7368 7681 8890 9045 9119 9161 9267 9341 9386 9506 9510 9606 9640-9641 9780 9787 9807 9813 9815 9818 9830 9850 9902 9911 9914 9937 9941 9946 9987 9992 10017 10019 10027 10095 10098 10104-10105 10181-10182 10192 10200 10202 10213 10215 10257 10270 10293 10378-10379 10382 10400-10401 10487 10551 10593 10638 10657 10695 10707 10710 10712 10725-10726 10862 10869 10874 10911 10926 10929 10934 10954-10955 11023 11040-11041 11043 11047 11264 11303 11393 11404 11407 11412 11432-11433 11596 17747 17756 18769 18779 19096 19120-19121 23101-23102 23182 23185 23194 23196 23201 23204 23207 23212 23216 28281-28282 28360 28366 28368-28369 28385 28627 28630 28636 30040 32509https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/481/5580?format=asciiOpticaldefaultJ/MNRAS/481/5580/tablea1Physical properties and derived quantities of the lenticular galaxies used in this workSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDMaNGA Plate IFUmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzRedshift (1)src.redshiftfloatMstarStellar mass (1)1e+10solMassphys.massdoubleb/aAxis ratio (2)phys.angSize;arith.ratiofloatB/TBulge to total ratio (2)meta.notefloatRbBulge effective radius (2)phys.angSize;srcfloatnbSersic index, bulge component (2)stat.fit.paramfloatAgeBulge? Bulge stellar agelog(Gyr)time.agefloatnullableAgeDisc? Disc stellar agelog(Gyr)time.agefloatnullable[Z/H]B? Bulge metallicityphys.abund.Zfloatnullable[Z/H]D? Disc metallicityphys.abund.ZfloatnullableQlss? Tidal strength paramater (3)phys.atmol.collStrengthdoublenullableetak? Projected galaxy number density (3)phys.densitydoublenullableJ/MNRAS/481/5580/tablea2Measured spectral indices for lenticular galaxies in this workFe5270D? Disc Fe5270 Lick index0.1nmspect.indexfloatnullableFe5335B? Bulge Fe5335 Lick index0.1nmspect.indexfloatnullableFe5335D? Disc Fe5335 Lick index0.1nmspect.indexfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDMaNGA Plate IFUmeta.id;meta.maincharHbetaB? Bulge H {beta} Lick index0.1nmspect.index;em.line.HbetafloatnullableHbetaD? Disc H {beta} Lick index0.1nmspect.index;em.line.HbetafloatnullableMgbB? Bulge Mgb Lick index0.1nmspect.indexfloatnullableMgbD? Disc Mgb Lick index0.1nmspect.indexfloatnullableFe5270B? Bulge Fe5270 Lick index0.1nmspect.indexfloatnullable