J/A+A/605/A74ivo://CDS.VizieR/J/A+A/605/A74doi:10.26093/cds/vizier.36050074CDSKokusho T.Kaneda H.Bureau M.Suzuki T.Murata K.Kondo A.,Yamagishi M.2018-02-02T12:18:07Z2017-12-19T15:02:40ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesinfrared-photometryThe star formation properties of early-type galaxies (ETGs) are currently the subject of considerable interest, particularly whether they differ from the star formation properties of gas-rich spirals. We perform a systematic study of star formation in a large sample of local ETGs with polycyclic aromatic hydrocarbon (PAH) and dust emission, focusing on the star formation rates (SFRs) and star formation efficiencies (SFEs) of the galaxies. Our sample is composed of the 260 ETGs from the ATLAS^3D^ survey, from which we used the cold gas measurements (HI and CO). We estimated the SFRs from stellar, PAH, and dust fits to spectral energy distributions created from new AKARI measurements and with literature data from WISE and 2MASS. The mid-infrared luminosities of non-CO-detected galaxies are well correlated with their stellar luminosities, showing that they trace (circum)stellar dust emission. CO-detected galaxies show an excess above these correlations, uncorrelated with their stellar luminosities, indicating that they likely contain PAHs and dust of interstellar origin. PAH and dust luminosities of CO-detected galaxies show tight correlations with their molecular gas masses; the derived current SFRs are typically 0.01-1M_{sun}_/yr. These SFRs systematically decrease with stellar age at fixed stellar mass, while they correlate nearly linearly with stellar mass at fixed age. The majority of local ETGs follow the same star formation law as local star-forming galaxies and their current SFEs do not depend on either stellar mass or age. Our results clearly indicate that molecular gas is fueling current star formation in local ETGs, which appear to acquire this gas via mechanisms regulated primarily by stellar mass. The current SFEs of local ETGs are similar to those of local star-forming galaxies, indicating that their low SFRs are likely due to smaller cold gas fractions rather than a suppression of star formation.2017A&A...605A..74Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/605/A74CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)II/298 : AKARI/FIS All-Sky Survey Point Source Cat. (ISAS/JAXA, 2010)J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)J/MNRAS/414/888 : ATLAS3D project. III. (Emsellem+, 2011)J/MNRAS/414/940 : ATLAS3D project. IV. (Young+, 2011)J/MNRAS/416/1680 : ATLAS3D project. VII. (Cappellari+, 2011)J/MNRAS/433/2812 : ATLAS3D project. XXIII. (Krajnovic+, 2013)J/MNRAS/446/120 : ATLAS3D project. XXIX (Duc+, 2015)J/MNRAS/448/3484 : ATLAS3D Project. XXX (McDermid+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/605/A74https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/605/A74http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/605/A74https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/605/A74https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/605/A74http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/605/A74GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/605/A74/tablea1 (AKARI-measured infrared fluxes of all ATLAS3D galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/605/A74/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/605/A74/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/605/A74/tablea1?GETtext/xml+votable180.050000true146.4722333-0.26912220.0055555555555555565/4581 6941 6/664 697 2145 2374 4439 4447 4565 4807 4829 4840 4869 4930 4989 5021 5075 5125 5134 5182 5196 5198 5288 5398 5429 5474 5599 5608 5745 5773 5975 5999 6012 6082 6087 6089-6090 6093 6097 6099 6103 6162 7214 7287 7355 7374 7385 7424 7442 7460 7560 8193 8195-8197 8208 8228 8533 9186 10454 10501 10523 10551 10616 10637 10714 10720 10739 10845 10924 10980 11026 11246 11253 11418 11435 11443 11457 11776 11791 11800 11824 13336 13401 15056 15204 17744 17761 18002 18209 18269 18755 18766 19442 20014 20070 20101 22740 22914 23177-23178 25571 25893 25907 25979 26055 26065 26125 26149 26157 26166 26173 26210 26285 26307 26313 26316 26361-26362 26530 26542 27079 27135 27186 27199 27255 27367 27480 27515 27518 27578 27582 27595 27604 27669 27671 27712-27714 27718-27720 27722-27723 27728 27734-27736 27738-27739 27743 27755 27758 27773-27774 27802 27857 27861 27905 27907-27908 27913-27915 27921 27931 27936 27938 27944 27946 28033 28037-28038 28045 28142 28200 28221 28264 28300 28311 28362 28491 28495 28524 28538 28601 28653 31340 31404 31418 31453-31454 31499 31624 32168-32169 32482 32539 36819 36831 409521.1655134642791134e-21 2.856455625839913e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/605/A74?format=asciiInfrareddefaultJ/A+A/605/A74/tablea1AKARI-measured infrared fluxes of all ATLAS3D galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLIRindicates infrared luminosities in tablea2meta.ref.urlcharGalaxyGalaxy namemeta.id;meta.maincharprimaryF9um? AKARI flux at 9ummJyphot.flux.density;em.IR.8-15umfloatnullablee_F9um? rms uncertainty on F9ummJystat.errorfloatnullablen_F9um[ab] Note on F9um (1)meta.notecharF18um? AKARI flux at 18ummJyphot.flux.density;em.IR.15-30umfloatnullablee_F18um? rms uncertainty on F18ummJystat.errorfloatnullablen_F18um[ab] Note on F18um (1)meta.notecharF65um? AKARI flux at 65ummJyphot.flux.density;em.IR.30-60umdoublenullablee_F65um? rms uncertainty on F65ummJystat.errorfloatnullablen_F65um[ab] Note on F65um (1)meta.notecharF90um? AKARI flux at 90ummJyphot.flux.density;em.IR.60-100umdoublenullablee_F90um? rms uncertainty on F90ummJystat.errorfloatnullablen_F90um[ab] Note on F90um (1)meta.notecharF140um? AKARI flux at 140ummJyphot.flux.density;em.mm.1500-3000GHzdoublenullablee_F140um? rms uncertainty on F140ummJystat.errorfloatnullablen_F140um[ab] Note on F140um (1)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_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.mainJ/A+A/605/A74/tablea2Infrared luminosities derived from SED fittingGalaxyGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLPAHPAH luminosity1e+34Wphys.luminosity;em.IRfloate_LPAHrms uncertainty on LPAH1e+34Wstat.errorfloatLwarmLuminosity of warm dust1e+34Wphys.luminosity;em.IRfloate_Lwarmrms uncertainty on Lwarm1e+34Wstat.errorfloatLcoldLuminosity of cold dust1e+34Wphys.luminosity;em.IRfloate_Lcoldrms uncertainty on Lcold1e+34Wstat.errorfloat