J/MNRAS/476/875ivo://CDS.VizieR/J/MNRAS/476/875doi:10.26093/cds/vizier.74760875CDSCatinella B.Saintonge A.Janowiecki S.Cortese L.Dave R.,Lemonias J.J.Cooper A.P.Schiminovich D.Hummels C.B.Fabello S.,Gereb K.Kilborn V.Wang J.2024-08-18T20:18:50Z2021-02-26T09:07:04ZCDS support team

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

cds-question@unistra.frradio-galaxiesh-i-line-emissionWe present the extended GALEX Arecibo SDSS Survey (xGASS), a gas fraction-limited census of the atomic hydrogen (HI) gas content of 1179 galaxies selected only by stellar mass (M*=10^9^-10^11.5^M_{sun}_) and redshift (0.01<z<0.05). This includes new Arecibo observations of 208 galaxies, for which we release catalogues and HI spectra. In addition to extending the GASS HI scaling relations by one decade in stellar mass, we quantify total (atomic+molecular) cold gas fractions and molecular-to-atomic gas mass ratios, Rmol, for the subset of 477 galaxies observed with the IRAM 30m telescope. We find that atomic gas fractions keep increasing with decreasing stellar mass, with no sign of a plateau down to logM*/M_{sun}_=9. Total gas reservoirs remain HI-dominated across our full stellar mass range, hence total gas fraction scaling relations closely resemble atomic ones, but with a scatter that strongly correlates with Rmol, especially at fixed specific star formation rate. On average, Rmol weakly increases with stellar mass and stellar surface density {mu}*, but individual values vary by almost two orders of magnitude at fixed M* or {mu}*. We show that, for galaxies on the star-forming sequence, variations of Rmol are mostly driven by changes of the HI reservoirs, with a clear dependence on {mu}*. Establishing if galaxy mass or structure plays the most important role in regulating the cold gas content of galaxies requires an accurate separation of bulge and disc components for the study of gas scaling relations2018MNRAS.476..875Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/476/875CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/233/22 : xCOLD GASS catalog (Saintonge+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/476/875https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/476/875http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/476/875https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/476/875https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/476/875http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/476/875GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/476/875/tablea1 (SDSS and UV parameters of GASS-low galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/476/875/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/476/875/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/476/875/tablea1?GETtext/xml+votable180.050000true1.581708314.32741670.005555555555555556Cone search capability for table J/MNRAS/476/875/tablea2 (HI Properties of GASS-low detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/476/875/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/476/875/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/476/875/tablea2?GETtext/xml+votable180.050000true1.622041714.18236110.005555555555555556Cone search capability for table J/MNRAS/476/875/tablea3 (GASS-low non-detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/476/875/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/476/875/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/476/875/tablea3?GETtext/xml+votable180.050000true1.581708314.32741670.0055555555555555566/4168 4180 4182 4194-4195 4201 4209 4212 4214 4218 4264 4300 4302 4308 4349 4352 4370 4378 4381 4452 4457 4520 4589 4642 4652 4657 4714 4718-4719 4734 4801 4811 4825 4839 4863 4870 4880 4921 4948 4998 5034 5164-5165 5170 5175 5230 6216 6234 6437 8364 8711 8714 8743 8754-8755 8835 8839 8841 8858 8862-8863 8922 8924-8925 9098 10334 10350 10357 10377-10379 10392 10397 10400-10401 10406 10440 10471 10765 18009 18096-18097 18299 18302 19411 19417 19672-19673 19761 19995-19996 21971 21976 22002 22011 22361 22364 22366 26059 26104 26312 26367 26388 26432 26436 26451 26460 26463 26598 26971 27312 27314 27324 27338 27344 27350 27381 27399 27424 27560 27564-27565 27567 27590 27592 27618 27652 27654 27668 27888 28081 28125-28126 28144 28146 28148 28162 28164 28224 28228 28230 28251 28263 28299 28346 28371 28453 28464 28476 28512 28608 28619https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/476/875?format=asciiRadiodefaultJ/MNRAS/476/875/tablea1SDSS and UV parameters of GASS-low galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGASSGASS identifiermeta.id;meta.mainintSDSSSDSS identifiermeta.idcharONameOther namemeta.idcharzSDSSSDSS redshiftsrc.redshift;pos.heliocentricfloatlogM*log10 Stellar masslog(solMass)phys.massfloatR50zRadius containing 50 per cent of the Petrosian flux in z bandarcsecphys.angSize;srcfloatR50rRadius containing 50 per cent of the Petrosian flux in r bandarcsecphys.angSize;srcfloatR90rRadius containing 90 per cent of the Petrosian flux in r bandarcsecphys.angSize;srcfloatlogSuBrlog10 stellar mass surface densitylog(solMass.kpc**-2)phys.densityfloatextrGalactic extinction in r band from SDSSmagphys.absorptionfloatrmagr-band model magnitude from SDSS, corrected for Galactic extinctionmagphot.mag;em.opt.Rfloat(b/a)rMinor-to-major axial ratio from the exponential fit in r band, from SDSSphys.angSize;arith.ratiofloatinclInclination to the line of sightdegsrc.orbital.inclination;spect.lineintNUV-r? NUV-r observed colour, corrected for Galactic extinctionmagphot.color;em.UV;em.optfloatnullableSFR? Star formation rate from NUV and WISE photometrysolMass/yrphys.SFRfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/476/875/tablea2HI Properties of GASS-low detectionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGASSGASS identifiermeta.id;meta.mainintSDSSSDSS identifiermeta.idcharzSDSSSDSS redshiftsrc.redshift;pos.heliocentricfloatTonOn-source integration time of the Arecibo observationmintime.expointDVVelocity resolution of the final, smoothed spectrum, {DELTA}Vkm/sphys.velocintzRedshift measured from the HI spectrumsrc.redshiftdoubleW50Observed velocity width of the source line profile, measured at the 50 per cent level of each peakkm/sspect.line.widthinte_W50rms uncertainty on W50km/sstat.errorintW50cVelocity width corrected for instrumental broadening and cosmological redshift onlykm/sspect.line.widthintFHIIntegrated HI-line flux densityJy.km/sphot.flux.densityfloate_FHIrms uncertainty on FHIJy.km/sstat.errorfloatrmsrms noise of the observationmJystat.stdev;instr.det.noise;obsfloatS/NSignal-to-noise ratio of the HI spectrumstat.snrfloatlogMHIlog10 HI masslog(solMass)phys.massfloatlogMHI/M*log10 HI mass fractionphys.mass;arith.ratiofloatq[1/5] Quality flag (1)meta.code.qualintNote[*] * indicates a note in notes.dat filemeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/476/875/tablea3GASS-low non-detectionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGASSGASS identifiermeta.id;meta.mainintSDSSSDSS identifiermeta.idcharzSDSSSDSS redshiftsrc.redshift;pos.heliocentricfloatTonOn-source integration time of the Arecibo observationmintime.expointrmsrms noise of the observationmJystat.stdev;instr.det.noise;obsfloatlogMHIlimupper limit on the HI masslog(solMass)phys.massfloatlogMHIlim/M*upper limit on the gas fractionphys.mass;arith.ratiofloatNote[*] * indicates a note in notes.dat filemeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/476/875/notesIndividual notesGASSGASS identifiermeta.id;meta.mainintNoteNotemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint