J/MNRAS/474/5076ivo://CDS.VizieR/J/MNRAS/474/5076doi:10.26093/cds/vizier.74745076CDSJohnson H.L.Harrison C.M.Swinbank A.M.Tiley A.L.Stott J.P.,Bower R.G.Smail I.Bunker A.J.Sobral D.Turner O.J.Best P.,Bureau M.Cirasuolo M.Jarvis M.J.Magdis G.Sharples R.M.,Bland-Hawthorn J.Catinella B.Cortese L.Croom S.M.Federrath C.,Glazebrook K.Sweet S.M.Bryant J.J.Goodwin M.Konstantopoulos I.S.,Lawrence J.S.Medling A.M.Owers M.S.Richards S.2024-08-18T20:17:42Z2021-04-19T13:18:13ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsredshiftedgalaxy-kinematicsWe analyse the velocity dispersion properties of 472 z~0.9 star-forming galaxies observed as part of the KMOS Redshift One Spectroscopic Survey (KROSS). The majority of this sample is rotationally dominated (83+/-5 per cent with vC/{sigma}0>1) but also dynamically hot and highly turbulent. After correcting for beam smearing effects, the median intrinsic velocity dispersion for the final sample is {sigma}0=43.2+/-0.8km/s with a rotational velocity to dispersion ratio of vC/{sigma}0=2.6+/-0.1. To explore the relationship between velocity dispersion, stellar mass, star formation rate, and redshift, we combine KROSS with data from the SAMI survey (z~0.05) and an intermediate redshift MUSE sample (z~0.5). Whilst there is, at most, a weak trend between velocity dispersion and stellar mass, at fixed mass there is a strong increase with redshift. At all redshifts, galaxies appear to follow the same weak trend of increasing velocity dispersion with star formation rate. Our results are consistent with an evolution of galaxy dynamics driven by discs that are more gas rich, and increasingly gravitationally unstable, as a function of increasing redshift. Finally, we test two analytic models that predict turbulence is driven by either gravitational instabilities or stellar feedback. Both provide an adequate description of the data, and further observations are required to rule out either model.2018MNRAS.474.5076Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/474/5076CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/467/1965 : KMOS Redshift One Spectroscopic Survey (Harrison+, 2017)http://astro.dur.ac.uk/KROSS : KROSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/474/5076https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/474/5076http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/474/5076https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/474/5076https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/474/5076http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/474/5076GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/474/5076/tablea1 (Intrinsic velocity dispersion and related quantities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/5076/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/5076/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/5076/tablea1?GETtext/xml+votable180.050000true2.11333349.9186110.0055555555555555566/2797 2808 14242 20413 20422-20423 20429 20431 20440 20442 20456https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/474/5076?format=asciidefaultJ/MNRAS/474/5076/tablea1Intrinsic velocity dispersion and related quantitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatsigma0obsObserved corrected velocity dispersionkm/sphys.veloc.dispersioninte_sigma0obsrms uncertainty on sigma0obskm/sstat.errorintsigma0Beam smearing corrected velocity dispersionkm/sphys.veloc.dispersioninte_sigma0rms uncertainty on sigma0km/sstat.errorintFlag[MO] Flag (1)meta.code.errorcharRd/RPSFRatio between the disc radius (in arcsec) and half of the seeing FWHMphys.size;arith.ratiofloate_Rd/RPSFrms uncertainty on Rd/RPSFstat.errorfloatQgGlobal Toomre Q_g_ parameter (2)stat.fit.paramfloatE_QgError on Q_g_ (upper value)stat.error;stat.maxfloate_QgError on Q_g_ (lower value)stat.errorfloat