J/A+A/614/A48ivo://CDS.VizieR/J/A+A/614/A48doi:10.26093/cds/vizier.36140048CDSBreda I.Papaderos P.2018-09-18T13:26:25Z2018-06-12T11:45:54ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsA key subject in extragalactic astronomy concerns the chronology and driving mechanisms of bulge formation in late-type galaxies (LTGs). The standard scenario distinguishes between classical bulges and pseudo-bulges (CBs and PBs, respectively), the first thought to form monolithically prior to disks and the second gradually out of disks. These two bulge formation routes obviously yield antipodal predictions on the bulge age and bulge-to-disk age contrast, both expected to be high (low) in CBs (PBs). Our main goal is to explore whether bulges in present-day LTGs segregate into two evolutionary distinct classes, as expected from the standard scenario. Other questions motivating this study center on evolutionary relations between LTG bulges and their hosting disks, and the occurrence of accretion-powered nuclear activity as a function of bulge stellar mass M* and stellar surface density {Sigma}*. In this study we have combined three techniques - surface photometry, spectral modeling of integral field spectroscopy data and suppression of stellar populations younger than an adjustable age cutoff with the code REMOVE YOUNG (RY) - toward a systematic analysis of the physical and evolutionary properties (e.g., M* , {Sigma}* and mass-weighted stellar age <t*>_M_ and metallicity <Z*>_M_, respectively) of a representative sample of 135 nearby (<=130Mpc) LTGs from the CALIFA survey that cover a range between 10^8.9^M_{sun}_ and 10^11.5^M_{sun}_ in total stellar mass M_*,T_. In particular, the analysis here revolves around <{delta}{mu}9G>, a new distance- and formally extinction-independent measure of the contribution by stellar populations of age >=9Gyr to the mean r-band surface brightness of the bulge. We argue that <{delta}{mu}9Gx > offers a handy semi-empirical tracer of the physical and evolutionary properties of LTG bulges and a promising means for their characterization.2018A&A...614A..48Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/614/A48CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/576/A135 : CALIFA DR2 (Garcia-Benito+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/614/A48https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/614/A48http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/614/A48https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/614/A48https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/614/A48http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/614/A48GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/614/A48/ltgs (Photometric, evolutionary and physical quantities for the galaxy under study (table C1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/614/A48/ltgs?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/614/A48/ltgs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/614/A48/ltgs?GETtext/xml+votable180.050000true217.298766730.07721110.0055555555555555566/43 626 738 995 2229 2251 2273 2641 4053 4178 4342 4511 4667 4719 4801 4806-4807 4843 4850 5028 5075 5241 5332 5399 5579 5591 5593 5980 6011 6045 6448 6977 7572 7584 7783 7824 7844 8045 8164 8331 8458 8552 8562 8743 8883 8973 9101 9126 9622 9874 9883 9885 9891 10025 10113 10221 10280 10380-10381 10398 10434 10518 10566 10570 10577 10612 10628-10629 10661 10674 10705 10711 10739 10778 10987 11111 11387 11396 11801 11832 11944 13316 16788 17238 17350 17509 17511 17571 17747 17761 17819 17912 18069 18173 18779 18800 19267 19325 19487 19489 19515 19537-19538 19589 19696 19749 19939 19954 19996 20040 20193 20279 20417-20418 21857 22654 22737 22742 23051 23356 26108 27748 28112 28513 28522 28579 29973 31628 32478 36604 36793 36857 49150https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/614/A48?format=asciidefaultJ/A+A/614/A48/ltgsPhotometric, evolutionary and physical quantities for the galaxy under study (table C1)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy name (name)meta.id;meta.maincharDistAssumed distance (distance)Mpcpos.distancefloatRBIsophotal radius of the bulge (B_r_Riso)kpcphys.size.radiusdoublelogM*Tlogarithm of the total stellar mass (T_logMnow) (1)log(solMass)phys.massdoublelogM*Blogarithm of the present-day stellar mass within RB (B_logMnow) (1)log(solMass)phys.massdouble<t*B>MMass-weighted stellar age of the bulge (B_tMass) (1)Gyrtime.agedoubles_<t*B>MDispersion of <t*B>M (B_tMass_E) (1)Gyrstat.errordouble<t*D>MMass-weighted stellar age of the disk (D_tMass) (1)Gyrtime.agedoubles_<t*D>MDispersion of <t*D>M (D_tMass_E) (1)Gyrstat.errordouble<Z*B>MMass-weighted stellar metallicity of the bulge (B_Zmass) (1)Sunphys.abund.Zdoubles_<Z*B>MDispersion of <Z*B>M (B_Zmass_E) (1)Sunstat.errordouble<Z*D>MMass-weighted stellar metallicity of the disk (D_Zmass) (1)Sunphys.abund.Zdoubles_<Z*D>MDispersion of <Z*D>M (D_Zmass_E) (1)Sunstat.errordoublelogS*Blogarithm of the mean stellar mass surface density in the bulge (B_logSSDensity) (1)log(solMass.kpc**-2)phys.densitydouble<md9G>Mean <{delta}{mu}9G> (rmag) within RB (DeltaMu_Rb)magphot.mag.distModdouble_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main