J/A+A/641/A24ivo://CDS.VizieR/J/A+A/641/A24doi:10.26093/cds/vizier.36410024CDSWang T.-M.Hwang C.-Y.2020-11-26T12:07:56Z2020-09-01T09:26:11ZCDS support team

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

cds-question@unistra.frgalaxiesmillimeter-astronomysubmillimeter-astronomyWe investigated the influence of the random velocity of molecular gas on star-formation activities of 6 nearby galaxies. The physical properties of a molecular cloud, such as temperature and density, influence star-formation activities in the cloud. Additionally, local and turbulent motions of molecules in a cloud may exert substantial pressure against gravitational collapse and thus prevent or reduce star formation in the cloud. However, the influence of gas motion on star-formation activities remains poorly understood. We used data from the Atacama Large Millimeter/submillimeter Array to obtain ^12^CO(J=1-0) flux and velocity dispersion. We then combined these data with 3.6 and 8 micron midinfrared data from the Spitzer Space Telescope to evaluate the effects of gas motion on star-formation activities in several nearby galaxies. We discovered that relatively high velocity dispersion in molecular clouds corresponded with relatively low star-formation activity. Considering the velocity dispersion as an additional parameter, we derived a modified Kennicutt-Schmidt law with a gas surface density power index 0.84 and velocity dispersion power index -0.61.2020A&A...641A..24Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/641/A24CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/641/A24https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/641/A24http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/641/A24https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/641/A24https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/641/A24http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/641/A24GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/641/A24/list (List of fits datacubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/641/A24/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/641/A24/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/641/A24/list?GETtext/xml+votable180.050000true213.29128-65.339020.0055555555555555566/18398 27741 28167 34273 34531 41586https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/641/A24?format=asciiMillimeterdefaultJ/A+A/641/A24/table1Galaxy informationArrayALMA array typemeta.code;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintALMAALMA Project codemeta.codecharGalaxyGalaxy namemeta.id;meta.maincharMorphMorphology of the galaxysrc.morph.typecharIncInclination angle of the galaxydsrc.orbital.inclination;pos.posAngintDistLuminosity Distance of the galaxyMpcpos.distancefloatJ/A+A/641/A24/table4Correlation between the velocity dispersion and ^12^CO(J=1-0) luminosity surface densityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharNNumber of data points for fittingmeta.idintRPearson correlation coefficientstat.fit.paramfloatPRProbability of the Pearson correlationstat.fit.goodnessfloatRohSpearman rank correlationstat.correlationfloatPRohProbability of the Spearman rank correlationstat.fit.goodnessfloatBeta1Fitting power law indexstat.fit.paramfloate_Beta1Fitting power law index errorstat.errorfloatC2Fitting constantstat.fit.paramfloate_C2Fitting constant errorstat.errorfloatJ/A+A/641/A24/table5Correlation between the velocity dispersion and SFR surface densityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharNNumber of data points for fittingmeta.idintRPearson correlation coefficientstat.fit.paramfloatPRProbability of the Pearson correlationstat.fit.goodnessfloatRohSpearman rank correlationstat.correlationfloatPRohProbability of the Spearman rank correlationstat.fit.goodnessfloatBeta2Fitting power law indexstat.fit.paramfloate_Beta2Fitting power law index errorstat.errorfloatC3Fitting constantstat.fit;arith.zpfloate_C3Fitting constant errorstat.errorfloatJ/A+A/641/A24/table6SFR surface density as a function of the velocity dispersion and ^12^CO(J=1-0) luminosity surface densityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharAlpha2Fitting power law indexstat.fit.paramfloate_Alpha2Fitting power law index errorstat.errorfloatBeta3Fitting power law indexstat.fit.paramfloate_Beta3Fitting power law index errorstat.errorfloatC4Fitting constantstat.fit;arith.zpfloate_C4Fitting constant errorstat.errorfloatJ/A+A/641/A24/listList of fits datacubesNzNumber of slicesmeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullablebFreqLower value of frequency intervalGHzem.freq;stat.minfloatBFreqUpper value of frequency intervalGHzem.freq;stat.maxfloatdFreqFrequency resolutionMHzem.freqdoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharJ/A+A/641/A24/table2Data information and selected box sizerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharvelresVelocity resolutionkm/sspect.resolutionfloatboxnumBox numbermeta.idcharbeamRestoring beam sizearcsecphys.angSize;instr.beamcharALMAboxALMA box sizearcsecphys.angSizecharSpitboxSpitzer box sizearcsecphys.angSizecharJ/A+A/641/A24/table3Correlation between the ^12^CO(J=1-0) luminosity surface density and SFR surface densityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharNNumber of data points for fittingmeta.idintRPearson correlation coefficientstat.fit.paramfloatPRProbability of the Pearson correlationstat.fit.goodnessfloatRohSpearman rank correlationstat.correlationfloatPRohProbability of the Spearman rank correlationstat.fit.goodnessfloatAlpha1Fitting power law indexstat.fit.paramfloate_Alpha1Fitting power law index errorstat.errorfloatC1Fitting constantstat.fit;arith.zpfloate_C1Fitting constant errorstat.errorfloat