J/MNRAS/446/2030ivo://CDS.VizieR/J/MNRAS/446/2030doi:10.26093/cds/vizier.74462030CDSZaritsky D.Gil de Paz A.Bouquin A.Y.K.2024-08-14T20:18:44Z2015-11-03T13:56:44ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryultraviolet-photometryWe extend our initial study of the connection between the UV colour of galaxies and both the inferred stellar mass-to-light ratio, {Upsilon}*, and a mass-to-light ratio referenced to Salpeter initial mass function (IMF) models of the same age and metallicity, {Upsilon}*/{Upsilon}_Sal_, using new UV magnitude measurements for a much larger sample of early-type galaxies, ETGs, with dynamically determined mass-to-light ratios. We confirm the principal empirical finding of our first study, a strong correlation between the GALEX FUV-NUV colour and {Upsilon}*. We show that this finding is not the result of spectral distortions limited to a single passband (e.g. metallicity-dependent line-blanketing in the NUV band), or of the analysis methodology used to measure {Upsilon}*, or of the inclusion or exclusion of the correction for stellar population effects as accounted for using {Upsilon}*/{Upsilon}_Sal_. The sense of the correlation is that galaxies with larger {Upsilon}*, or larger {Upsilon}*/{Upsilon}_Sal_, are bluer in the UV. We conjecture that differences in the low-mass end of the stellar IMF are related to the nature of the extreme horizontal branch stars generally responsible for the UV flux in ETGs. If so, then UV colour can be used to identify ETGs with particular IMF properties and to estimate {Upsilon}*. We also demonstrate that UV colour can be used to decrease the scatter about the Fundamental Plane and Manifold, and to select peculiar galaxies for follow-up with which to further explore the cause of variations in {Upsilon}* and UV colour.2015MNRAS.446.2030Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/2030CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/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)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/2030https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/2030http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/2030https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/446/2030https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/446/2030http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/446/2030GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/446/2030/table1 (Galaxy sample and properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/2030/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/2030/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/2030/table1?GETtext/xml+votable180.050000true168.16590839.05573610.0055555555555555565/6941 6/697 2145 2374 4447 4565 4807 4829 4989 5021 5125 5134 5182 5196 5288 5429 5474 5599 5999 6087 6090 6093 6097 6103 7214 7287 7355 7374 7385 7424 7442 7460 8193 8195-8197 8228 10454 10523 10637 10720 10845 10924 10980 11026 11246 11253 11435 11443 11776 11791 11800 11824 13336 13401 17761 18002 18209 18269 18325-18327 18755 18766 19442 23177-23178 25893 25907 25979 26055 26065 26125 26157 26166 26173 26210 26285 26307 26313 26361-26362 26542 27079 27135 27186 27255 27367 27480 27515 27518 27595 27604 27669 27671 27712 27714 27718-27720 27722-27723 27728 27734-27736 27738-27739 27743 27755 27773-27774 27802 27857 27861 27905 27907-27908 27913-27915 27931 27936 27938 27944 27946 28033 28037-28038 28045 28200 28221 28300 28311 28491 28495 28524 28538 28653 31454 32168 32482 36831 409527.447298006782415e-19 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/446/2030?format=asciiUVOpticaldefaultJ/MNRAS/446/2030/table1Galaxy sample and propertiesNameGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFUVGALEX FUV asymptotic magnitudemagphot.mag;em.UV.100-200nmfloate_FUV1 sigma uncertainty in FUV magnitudemagstat.errorfloatNUVGALEX NUV asymptotic magnitudemagphot.mag;em.UVfloate_NUV1 sigma uncertainty in NUV magnitudemagstat.errorfloatDistAdopted distance to galaxyMpcpos.distancefloatSimbadSimbad 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.main