J/other/RAA/24.Eivo://CDS.VizieR/J/other/RAA/24.E5005CDSHe C.Xu C.Lisenfeld U.Dai Y.S.Fang T.Huang J.Wang W.Yu Q.2025-09-01T07:18:35Z2025-08-28T09:25:21ZCDS support team

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

cds-question@unistra.frinteracting-galaxiesgalaxiesphotometryvisible-astronomysloan-photometryinfrared-astronomyWe present a study of star-forming galaxies (SFGs) with pseudobulges (bulges with Sersic index n<2) in a local close major-merger galaxy pair sample (H-KPAIR). With data from new aperture photometries in the optical and near-infrared bands (aperture size of 7kpc) and from the literature, we find that the mean Age of central stellar populations in Spirals with pseudobulges is consistent with that of disky galaxies and is nearly constant against the bulge-to-total ratio (B/T). Paired Spirals have a slightly lower fraction of pure disk galaxies (B/T<=0.1) than their counterparts in the control sample. Compared to SFGs with classical bulges, those with pseudobulges have a higher (>2{sigma}) mean of specific star formation rate (sSFR) enhancement (sSFRenh=0.33+/-0.07 versus sSFRenh=0.12+/-0.06) and broader scatter (by ~1dex). The eight SFGs that have the highest sSFRenh in the sample all have pseudobulges. A majority (69%) of paired SFGs with strong enhancement (having sSFR more than 5 times the median of the control galaxies) have pseudobulges. The Spitzer data show that the pseudobulges in these galaxies are tightly linked to nuclear/circum-nuclear starbursts. Pseudobulge SFGs in S+S and in S+E pairs have significantly (>3{sigma}) different sSFR enhancement, with the means of sSFRenh=0.45+/-0.08 and -0.04+/-0.11, respectively. We find a decrease in the sSFR enhancements with the density of the environment for SFGs with pseudobulges. Since a high fraction (5/11) of pseudobulge SFGs in S+E pairs are in rich groups/clusters (local density N1Mpc>=7), the dense environment might be the cause for their low sSFRenh.2024RAA....24e5005Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/24.E5005CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/261/34 : Bulge-disk decomposition of H-KPAIR sample (He+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RAA/24.E5005https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RAA/24.E5005http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RAA/24.E5005https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RAA/24.E5005https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RAA/24.E5005http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RAA/24.E5005GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RAA/24.E5005/table2 (Aperture photometry and model fits of the H-KPAIR Sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RAA/24.E5005/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RAA/24.E5005/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RAA/24.E5005/table2?GETtext/xml+votable180.050000true5.10753920.82640470.0055555555555555566/4718 4742 4996 5040 5078 5348 5365 5404 5515 5567 5592 5597 5719 5816 5891 5930 5942 6029 6043 6057 6090 6459 6464 6527 7187 7223 7344 8210 8212 8373 8573 9176 9268 9344 9402 9454 9471 9507 9828 9859 9883 9933 9946 9998 10514 10518 10574 10652 10739 10823 10847 10878 10915 10948 11007 11049 11264 11463 11476 11876 11908 17812 18003 18098 23197 25841 25887 25914 25989 25992 26064 26239 26987 27077 27339 27370 27394 27466 27480 27525 27652 27769 27878 28599 28652 28655 30044 324038.650015785639275e-20 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RAA/24.E5005?format=asciiOpticalInfrareddefaultJ/other/RAA/24.E5005/table1Spiral Galaxies in H-KPAIRrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy name (JHHMMSSss+DDMMSSs)meta.id;meta.maincharzRedshiftsrc.redshiftfloatPairType[SS SE] Pair type (1)meta.codecharBulgeType[pc] Bulge type (2)meta.codecharisFSFG[0/1] is the galaxy an SFG, 1 for true and 0 for falsemeta.codeintrmagMagnitude of SDSS r-bandmagphot.mag;em.opt.RfloatB/TBulge-to-Total ratiophys.luminosity;arith.ratiofloatlogM*Stellar masslog(solMass)phys.massfloatsSFRenhSpecific star formation rate enhancementmeta.idfloatN1MpcNumber of galaxies brighter than M_r_=-19.7mag within a D=1Mpc circle centered on the galaxymeta.numberintJ/other/RAA/24.E5005/table2Aperture photometry and model fits of the H-KPAIR SamplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSdataindicates data in table 1meta.ref.urlcharNameGalaxy name (JHHMMSSss+DDMMSSs)meta.id;meta.maincharprimaryType[SE] Galaxy type: S = Spiral, E = Ellipticalmeta.codecharumagMagnitude of SDSS u-band in 7 kpc aperturemagphot.mag;em.opt.Ufloate_umagMagnitude of SDSS u-band 7 kpc aperture errormagstat.error;phot.magfloatrmagMagnitude of SDSS r-band in 7 kpc aperturemagphot.mag;em.opt.Rfloate_rmagMagnitude of SDSS r-band 7 kpc aperture errormagstat.error;phot.magfloatimagMagnitude of SDSS i-band in 7 kpc aperturemagphot.mag;em.opt.Ifloate_imagMagnitude of SDSS i-band 7 kpc aperture errormagstat.error;phot.magfloatKsmagMagnitude of 2MASS Ks-band in 7 kpc aperturemagphot.mag;em.IR.Kfloate_KsmagMagnitude of 2MASS Ks-band 7 kpc aperture errormagstat.error;phot.magfloatAgeStellar age generated from u-r-i-Ks colorGyrtime.agefloatAVAttenuation of V-band generated from u-r-i-Ks colormagphys.absorptionfloat_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.mainSimbadNameSimbad column added by the CDSmeta.idcharnullable