J/ApJ/586/794ivo://CDS.VizieR/J/ApJ/586/794doi:10.26093/cds/vizier.15860794CDSBell E.F.2017-10-09T13:34:20Z2006-01-11T21:39:45ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryapparent-magnitudeinfrared-photometryultraviolet-photometryradio-astronomyI have assembled a diverse sample of galaxies from the literature with far-ultraviolet (FUV), optical, infrared (IR), and radio luminosities to explore the calibration of radio-derived and IR-derived star formation (SF) rates and the origin of the radio-IR correlation. By comparing the 8-1000{mu}m IR, which samples dust-reprocessed starlight, with direct stellar FUV emission, I show that the IR traces most of the SF in luminous ~L* galaxies but traces only a small fraction of the SF in faint ~0.01L* galaxies. If radio emission were a perfect SF rate indicator, this effect would cause easily detectable curvature in the radio-IR correlation. Yet, the radio-IR correlation is nearly linear. This implies that the radio flux from low-luminosity galaxies is substantially suppressed, compared to brighter galaxies. This is naturally interpreted in terms of a decreasing efficiency of nonthermal radio emission in faint galaxies. Thus, the linearity of the radio-IR correlation is a conspiracy: both indicators underestimate the SF rate at low luminosities. SF rate calibrations that take into account this effect are presented, along with estimates of the random and systematic error associated with their use.2003ApJ...586..794Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/586/794CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/586/794https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/586/794http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/586/794https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/586/794https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/586/794http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/586/794GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/586/794/tablea1 (Galaxy Luminosities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/586/794/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/586/794/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/586/794/tablea1?GETtext/xml+votable180.050000true23.4625830.660190.0055555555555555566/2155 2320 2409 4511 4719 5116 5492 5503 5556 5581 5584 5586 5587 5589 5590 5591 5593 5596 5623 5629 5975 5980 5982 5995 6034 6037 6042 6047 6063 6090 7602 7604 7606 7624 7743 7763 7799 7878 7957 7980 8106 8195 8509 8562 8673 9190 9437 9770 9899 10011 10144 10280 10380 10402 10429 10465 10472 10475 10637 10650 10661 10761 10769 10781 10841 10856 10892 10900 10901 10905 10911 10912 10979 11006 11027 11093 11101 11126 11180 11227 11371 11375 11382 11434 11435 11460 11639 13907 15592 16441 16655 16755 16884 17904 18002 18398 18809 19910 20023 20177 22828 25172 25344 25594 26161 26175 26234 26260 26261 26267 26294 26303 26317 26323 26329 26330 26331 26338 26344 26351 26362 26537 26858 26971 27514 27515 27555 27668 27712 27713 27715 27716 27718 27719 27724 27728 27731 27736 27738 27741 27757 27761 27762 27763 27766 27767 27772 27773 27857 27860 27861 27863 27869 27871 27901 27907 27917 27918 27939 27941 27943 27948 27955 28023 28033 28035 28037 28038 28044 28053 28064 28070 28076 28077 28087 28126 28146 28147 28173 28251 28267 28416 28486 28489 28495 28508 28517 28630 28631 28637 33193 33271 33957 33964 33968 33986 34401 34404 34471 34495 34641 38139 38821 40410 43621 43717 43874 43878 43880 43881 43882 43925 45587 45748 45750 45757 45802 46399 47125 47127 47178 47701https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/586/794?format=asciiUVOpticalInfraredRadiodefaultJ/ApJ/586/794/tablea1Galaxy LuminositiesGalaxyGalaxy namecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlogFUV? Log of the Far UltraViolet luminosity (1)log(10W/nm)floatnullablee_logFUV? Error in FUV (1)log(10W/nm)floatnullablelogLIRtot? Log of the total Infrared luminosity (2)log(W)floatnullablelogLFIR? The Far Infrared IRAS luminosity computed following Helou et al. (1988ApJS...68..151H)log(W)floatnullableF100/60? The IRAS 100 to 60 micron ratiofloatnullablelogL1.4GHz? Log of the 1.4 GHz luminositylog(W.Hz**-1)floatnullablee_logL1.4GHz? Error in 1.4GHzlog(W.Hz**-1)floatnullablefTher? Thermal radio fraction (3)floatnullablee_fTher? Error in fTherfloatnullableVMAG? Absolute V band magnitude (4)magfloatnullablee_VMAG? Error in VMAGmagfloatnullableAVExtinction in the V band magnitudemagfloatDistDistanceMpcfloatlogLHa? Log of the H{alpha} luminositylog(W)floatnullableAHa? H{alpha} extinction from the Balmer decrement (5)magfloatnullableMTypeMorphology typecharRefsReferences, in refs.dat file (6)charNotesNotes (7)charSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar_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/ApJ/586/794/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codecharBibCodeBibCodecharAutAuthor's namecharComCommentschar