J/MNRAS/437/3883ivo://CDS.VizieR/J/MNRAS/437/3883doi:10.26093/cds/vizier.74373883CDSGrootes M.W.Tuffs R.J.Popescu C.C.Robotham A.S.G.Seibert M.,Kelvin L.S.2024-08-07T20:12:42Z2014-02-05T14:14:22ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrygalaxy-classification-systemsWe present a non-parametric cell-based method of selecting highly pure and largely complete samples of spiral galaxies using photometric and structural parameters as provided by standard photometric pipelines and simple shape fitting algorithms. The performance of the method is quantified for different parameter combinations, using purely human-based classifications as a benchmark. The discretization of the parameter space allows a markedly superior selection than commonly used proxies relying on a fixed curve or surface of separation. Moreover, we find structural parameters derived using passbands longwards of the g band and linked to older stellar populations, especially the stellar mass surface density mu_*_ and the r band effective radius r_e_, to perform at least equally well as parameters more traditionally linked to the identification of spirals by means of their young stellar populations, e.g. UV/optical colours. In particular the distinct bimodality in the parameter mu_*_, consistent with expectations of different evolutionary paths for spirals and ellipticals, represents an often overlooked yet powerful parameter in differentiating between spiral and non-spiral/elliptical galaxies. We use the cell-based method for the optical parameter set including r_e_ in combination with the Sersic index n and the i-band magnitude to investigate the intrinsic specific star-formation rate - stellar mass relation ({psi}_*_-M_*_) for a morphologically defined volume limited sample of local universe spiral galaxies. The relation is found to be well described by {psi}_*_{propto}M_*_^-0.5^ over the range of 10^9.5^M_{sun}_<=M_*_<=10^11^M_{sun}_ with a mean interquartile range of 0.4dex. This is somewhat steeper than previous determinations based on colour-selected samples of star-forming galaxies, primarily due to the inclusion in the sample of red quiescent disks.2014MNRAS.437.3883Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/437/3883CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/405/783 : Passive red spirals in Galaxy Zoo (Masters+, 2010)J/MNRAS/410/166 : Morphological types from Galaxy Zoo 1 (Lintott+, 2011)J/MNRAS/435/2835 : Morphological types from Galaxy Zoo 2 (Willett+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/437/3883https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/437/3883http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/437/3883https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/437/3883https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/437/3883http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/437/3883GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/MNRAS/437/3883/tablea1Cell-based discretizations for the parameter combination (log(n),log(r_e_),Mi)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRes[2/4] Resolution level to which cell belongsmeta.codeintlog(n)[-0.3/0.84] Value of Sersic index, log(n), for front lower left corner of cellstat.fit.paramdoublelog(re)Value of effective radius, log(r_e_), for front lower left corner of celllog(kpc)phys.size.radiusdoubleiMAGValue of absolute i band magnitude (AB system) Mi for front lower left corner of cellmagphys.magAbs;stat.mindoubledlog(n)Extent of cell in log(n)stat.paramdoubledlog(re)Extent of cell in log(r_e_)log(kpc)stat.paramdoubledMiExtent of cell in Mimagstat.paramfloatSPF[0/1]? Spiral fraction of cell's galaxy population (default 0.)meta.numberfloatnullablee_SPF[0/1.42]? Relative error on the cell's spiral fraction expressed as a fractionstat.errorfloatnullableEF[0/1]? Elliptical fraction of cell's galaxy population (default 0.)meta.numberfloatnullablee_EF[0/1.42]? Relative error on the cell's elliptical fraction expressed as a fractionstat.errorfloatnullableJ/MNRAS/437/3883/tablea2Cell-based discretizations for the parameter combination (log(n),log(r_e_),log({mu}*))recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRes[1/4] Resolution level to which cell belongsmeta.codeintlog(n)[-0.3/0.84] Value of Sersic index, log(n), for front lower left corner of cellstat.fit.paramdoublelog(re)Value of effective radius, log(r_e_), for front lower left corner of celllog(kpc)phys.size.radiusdoublelog(mu*)Value of stellar mass surface density, log({mu}*), for front lower left corner of celllog(solMass.kpc**-2)phys.densitydoubledlog(re)Extent of cell in log(r_e_)log(kpc)stat.paramfloatdlog(mu*)Extent of cell in log({mu}*)log(solMass.kpc**-2)stat.paramfloatSPF[0/1]? Spiral fraction of cell's galaxy population (default 0.)meta.numberfloatnullablee_SPF[0/1.42]? Relative error on the cell's spiral fraction expressed as a fractionstat.errorfloatnullableEF[0/1]? Elliptical fraction of cell's galaxy population (default 0.)meta.numberfloatnullablee_EF[0/1.42]? Relative error on the cell's elliptical fraction expressed as a fractionstat.errorfloatnullabledlog(n)Extent of cell in log(n)stat.paramdoubleJ/MNRAS/437/3883/tablea3Cell-based discretizations for the parameter combination (log(n),log(M*),log({mu}*))recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRes[2/4] Resolution level to which cell belongsmeta.codeintlog(n)[-0.3/0.84] Value of Sersic index, log(n), for front lower left corner of cellstat.fit.paramdoublelog(M*)Value of stellar mass, log(M*), for front lower left corner of celllog(solMass)phys.massdoublelog(mu*)Value of stellar mass surface density, log({mu}*), for front lower left corner of celllog(solMass.kpc**-2)phys.densitydoubledlog(n)Extent of cell in log(n)stat.paramdoubledlog(M*)Extent of cell in log(M*)log(solMass)stat.paramdoubledlog(mu*)Extent of cell in log({mu}*)log(solMass.kpc**-2)stat.paramfloatSPF[0/1]? Spiral fraction of cell's galaxy population (default 0.)meta.numberfloatnullablee_SPF[0/1.42]? Relative error on the cell's spiral fraction expressed as a fractionstat.errorfloatnullableEF[0/1]? Elliptical fraction of cell's galaxy population (default 0.)meta.numberfloatnullablee_EF[0/1.42]? Relative error on the cell's elliptical fraction expressed as a fractionstat.errorfloatnullable