J/ApJ/830/14ivo://CDS.VizieR/J/ApJ/830/14doi:10.26093/cds/vizier.18300014CDSSimons R.C.Kassin S.A.Trump J.R.Weiner B.J.Heckman T.M.Barro G.,Koo D.C.Guo Y.Pacifici C.Koekemoer A.Stephens A.W.2018-11-13T14:24:31Z2017-02-14T07:04:50ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyinfrared-astronomyredshiftedgalaxy-kinematicssurveysWe present results from a survey of the internal kinematics of 49 star-forming galaxies at z~2 in the CANDELS fields with the Keck/MOSFIRE spectrograph, Survey in the near-Infrared of Galaxies with Multiple position Angles (SIGMA). Kinematics (rotation velocity V_rot_ and gas velocity dispersion {sigma}_g_) are measured from nebular emission lines which trace the hot ionized gas surrounding star-forming regions. We find that by z~2, massive star-forming galaxies (logM_*_/M_{sun}_>~10.2) have assembled primitive disks: their kinematics are dominated by rotation, they are consistent with a marginally stable disk model, and they form a Tully-Fisher relation. These massive galaxies have values of V_rot_/{sigma}_g_ that are factors of 2-5 lower than local well-ordered galaxies at similar masses. Such results are consistent with findings by other studies. We find that low-mass galaxies (logM_*_/M_{sun}_<~10.2) at this epoch are still in the early stages of disk assembly: their kinematics are often dominated by gas velocity dispersion and they fall from the Tully-Fisher relation to significantly low values of V_rot_. This "kinematic downsizing" implies that the process(es) responsible for disrupting disks at z~2 have a stronger effect and/or are more active in low-mass systems. In conclusion, we find that the period of rapid stellar mass growth at z~2 is coincident with the nascent assembly of low-mass disks and the assembly and settling of high-mass disks.2016ApJ...830...14Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/830/14CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/150/153 : Team Keck Redshift Survey 2 (TKRS2) (Wirth+, 2015)J/A+A/582/A21 : Merging galaxies (mis)alignments (Barrera-Ballesteros+, 2015)J/AJ/149/178 : Redshift cat. of galaxies in GOODS-South field (Morris+, 2015)J/ApJS/207/24 : GOODS-S CANDELS multiwavelength catalog (Guo+, 2013)J/ApJS/206/10 : CANDELS multiwavelength catalog (Galametz+, 2013)J/ApJ/768/74 : PHIBSS: CO obs. of star-forming galaxies (Tacconi+, 2013)J/ApJS/203/24 : Structural param. of galaxies in CANDELS (van der Wel+, 2012)J/A+A/539/A91 : MASSIV I. Sample properties (Contini+, 2012)J/MNRAS/417/2347 : Tully-Fisher relation for SDSS galaxies (Reyes+, 2011)J/ApJ/741/115 : Deep spectroscopy in the GOODS fields (Miller+, 2011)J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)J/MNRAS/401/2113 : GHASP: H{alpha} data cubes for 153 galaxies (Epinat+, 2010)J/ApJ/706/1364 : SINS survey of high-redshift gal. (Forster Schreiber+, 2009)J/ApJ/653/1027 : TKRS/GOODS-N Field galaxies (Weiner+, 2006)J/A+A/455/107 : 3D spectroscopy with VLT/GIRAFFE (Flores+, 2006)J/ApJ/633/844 : Stellar mass in disk-dominated galaxies (Pizagno+, 2005)J/A+A/430/115 : SFR of distant galaxies (Hammer+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/830/14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/830/14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/830/14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/830/14https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/830/14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/830/14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/830/14/sigma (SIGMA - observational and physical and kinematic properties (tables 1 and 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/830/14/sigma?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/830/14/sigma?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/830/14/sigma?GETtext/xml+votable180.050000true53.1740833-27.85980.0055555555555555566/11252 17690 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/830/14?format=asciiInfrareddefaultJ/ApJ/830/14/sigmaSIGMA - observational and physical and kinematic properties (tables 1 and 2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1826/26736] SIGMA galaxy IDmeta.id;src.class.starGalaxyintRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.mainzsp[1.3/2.5] Spectroscopic redshiftsrc.redshiftfloatHmag[21.1/26.6] AB H band magnitude (2)magphot.mag;em.IR.HfloatMstar[9.2/11.8] Stellar galaxy mass (3)log(solMass)src.class.starGalaxyfloatSFR[0.2/3.7] Star formation rate (3)log(solMass.yr**-1)phys.SFRfloatb/aAspect ratio in the H band continuum (2)phys.angSize;arith.ratiofloatNsNumber of spectra in the full SIGMA samplemeta.numberintPAphot[-87/89] H-band continuum photometric major axisdegphys.angSize;em.IR.H;spect.continuumfloate_PAphot[0.2/22] Uncertainty in PAphotdegstat.errorfloatPAslit[-297/121] Keck/MOSFIRE slit position angle, maximum vsinidegpos.posAngfloatDeltaPA[1.6/87.7] Difference between PAphot, PAslitdegpos.posAngfloatrv[0.1/0.4] Fixed turnover radius of the rotation curve modelarcsecphys.angSize;meta.modelledfloatvsini[5/318] Projected rotational velocity, from the flat part of the best-fit rotation curvekm/sphys.veloc.rotatinte_vsini[14/78] Uncertainty in vsinikm/sstat.error;phys.veloc.rotatintVrot[5/448]? Inclination corrected rotational velocitykm/sphys.veloc.rotatintnullablee_Vrot[15/150]? Uncertainty in Vrotkm/sstat.errorintnullablesigg[10/129] {sigma}g, best-fit gas velocity dispersionkm/sphys.veloc.dispersion;meta.modelledinte_sigg[5/83] Uncertainty in {sigma}gkm/sstat.errorintCCatDisplay data from CANDELS catalogs (Santini+, 2015, J/ApJ/801/97; van der Wel+, 2012, J/ApJS/203/24 and Galametz+, 2013, J/ApJS/206/10) within 0.5"meta.ref.urlintnullableTKRS2Display data from the TKRS2 (Wirth+, 2015, J/AJ/150/153) within 0.5"meta.ref.urlintnullableGOODSDisplay data from CANDELS GOODS-S (Guo+, 2013, J/ApJS/207/24) within 0.5"meta.ref.urlintnullableSimbadNameSimbad column added by the CDSmeta.idchar