J/A+A/666/A161ivo://CDS.VizieR/J/A+A/666/A161doi:10.26093/cds/vizier.36660161CDSBik A.Ostlin G.Hayes M.Melinder J.Menacho V.2022-11-09T06:18:05Z2022-10-21T10:21:39ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesspectroscopygalaxy-kinematicsThe kinematics of galaxies provide valuable insights into their physics and assembly history. Kinematics are governed not only by the gravitational potential, but also by merger events and stellar feedback processes such as stellar winds and supernova explosions. We aim to identify what governs the kinematics in a sample of SDSS-selected nearby starburst galaxies, by obtaining spatially resolved measurements of the gas and stellar kinematics. We obtained near-infrared integral-field K-band spectroscopy with VLT/SINFONI for 15 compact starburst galaxies. We derived the integrated as well as spatially resolved stellar and gas kinematics. The stellar kinematics were derived from the CO absorption bands, and Pa{alpha} and Br{gamma} emission lines were used for the gas kinematics. Based on the integrated spectra, we find that the majority of galaxies have gas and stellar velocity dispersion that are comparable. A spatially resolved comparison shows that the six galaxies that deviate show evidence for a bulge or stellar feedback. Two galaxies are identified as mergers based on their double-peaked emission lines. In our sample, we find a negative correlation between the ratio of the rotational velocity over the velocity dispersion (v_rot_/{sigma}) and the star formation rate surface density. We propose a scenario where the global kinematics of the galaxies are determined by gravitational instabilities that affect both the stars and gas. This process could be driven by mergers or accretion events. Effects of stellar feedback on the ionised gas are more localised and detected only in the spatially resolved analysis. The mass derived from the velocity dispersion provides a reliable mass even if the galaxy cannot be spatially resolved. The technique used in this paper is applicable to galaxies at low and high redshift with the next generation of infrared-focussed telescopes (JWST and ELT).2022A&A...666A.161Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/666/A161CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/666/A161https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/666/A161http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/666/A161https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/666/A161https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/666/A161http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/666/A161GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/666/A161/table1 (Galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/666/A161/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/666/A161/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/666/A161/table1?GETtext/xml+votable180.050000true4.5381667-9.05995280.005555555555555556Cone search capability for table J/A+A/666/A161/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/666/A161/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/666/A161/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/666/A161/list?GETtext/xml+votable180.050000true4.53757-9.059820.0055555555555555566/8214 17255 19325 25598 25918 25990 26019 26088 26399 26423 26970 27859 31466 31485 36794https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/666/A161?format=asciiInfrareddefaultJ/A+A/666/A161/table1Galaxy samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (SDSS JHHMM+DDMM)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzRedshiftsrc.redshiftdoubleR50Petrosian radius R50 in r bandarcsecphys.angSize;srcfloate_R50rms uncertainty on R50arcsecstat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharEWHaH{alpha} equivalent width0.1nmspect.line.eqWidthfloate_EWHarms uncertainty on EWHa0.1nmstat.errorfloatKsmagSDSS Ks magnitudemagphot.mag;em.IR.KfloatSDSSSDSS name (SDSS JHHMMSS.ss+DDMMSS.s)meta.idcharfitsDisplay the fits file listmeta.ref.urlcharJ/A+A/666/A161/listList of fits filesrecnoRecord 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.mainscale? Scale of the imagearcsec/pixinstr.scalefloatnullableNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNz? Number of slices for the datacubesmeta.numberintnullableObs.dateObservation datestime.epoch;obsnullablebWAVE? Lower value of wavelength interval0.1nmem.wl;stat.mindoublenullableBWAVE? Upper value of wavelength interval0.1nmem.wl;stat.maxdoublenullabledWAVE? Wavelength resolution0.1nmspect.resolutiondoublenullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar