J/ApJ/753/95ivo://CDS.VizieR/J/ApJ/753/95doi:10.26093/cds/vizier.17530095CDSBond N.A.Gawiser E.Guaita L.Padilla N.Gronwall C.Ciardullo R.,Lai K.2017-06-12T08:24:47Z2014-03-14T09:06:25ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyultraviolet-astronomyredshiftedsurveysWe present a rest-frame ultraviolet morphological analysis of 108 z~2.1 Ly{alpha} emitters (LAEs) in the Extended Chandra Deep Field South and compare it to a similar sample of 171 LAEs at z~3.1. Using Hubble Space Telescope images from the Galaxy Evolution from Morphology and SEDs survey, Great Observatories Origins Deep Survey, and Hubble Ultradeep Field, we measure size and photometric component distributions, where photometric components are defined as distinct clumps of UV-continuum emission. At both redshifts, >80% of LAEs have observed half-light radii <2kpc, but the median half-light radius rises from 0.95+/-0.04kpc at z=3.1 to 1.41+/-0.14kpc at z=2.1. A similar evolution is seen in the sizes of individual rest-UV components, but there is no evidence for evolution in the number of multi-component systems. In the z=2.1 sample, we see clear correlations between the size of an LAE and other physical properties derived from its spectral energy distribution (SED). LAEs are found to be larger for galaxies with higher stellar mass, star formation rate, and dust obscuration, but there is no evidence for a trend between equivalent width and half-light radius at either redshift. The presence of these correlations suggests that a wide range of objects are being selected by LAE surveys at z~2, including a significant fraction of objects for which a massive and moderately extended population of old stars underlies the young starburst giving rise to the Ly{alpha} emission.2012ApJ...753...95Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/753/95CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/261 : GOODS initial results (Giavalisco+, 2004)J/ApJ/751/29 : Ly{alpha} profiles of LAEs at z=3.1 (Yamada+, 2012)J/ApJ/744/110 : LAE galaxies between 2.1=<z<=3.1 (Ciardullo+, 2012)J/ApJ/743/9 : z=3.1 LAEs morphological properties (Gronwall+, 2011)J/ApJ/736/31 : HETDEX pilot survey. II. 1.9<z<3.8 LAEs (Blanc+, 2011)J/ApJ/705/639 : Sizes of Lyman alpha emitters at z=3.1 (Bond+, 2009)J/ApJ/667/79 : Ly{alpha} emission-line galaxies at z=3.1 (Gronwall+, 2007)J/A+A/461/823 : Candidate Ly{alpha} emitting galaxies (Venemans+, 2007)J/AJ/132/1729 : Hubble Ultra Deep Field BVI-dropout sources (Beckwith+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/753/95https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/753/95http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/753/95https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/753/95https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/753/95http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/753/95GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/753/95/lae (LAE samples properties })https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/95/lae?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/95/lae?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/95/lae?GETtext/xml+votable180.050000true53.16882917-27.825691390.005555555555555556Cone search capability for table J/ApJ/753/95/laecomp (LAE component properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/95/laecomp?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/95/laecomp?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/95/laecomp?GETtext/xml+votable180.050000true53.16884167-27.825699720.0055555555555555566/35935 359572.76124552865182e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/753/95?format=asciiUVOpticaldefaultJ/ApJ/753/95/laeLAE samples properties }recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzRedshift of the LAE sample (2.1 for table2 or 3.1 for table 3)src.redshift;pos.heliocentricfloatnullableIDSource identification (G1)meta.id;meta.maincharprimaryNcNumber of LAE component (link to laecomp table)meta.numberintnullableSurveySurvey identification (GEMS, GOODS or HUDF)meta.idcharRAJ2000[3] Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000[27/28] Degree of declination (J2000) (1)pos.eq.dec;meta.mainVmag[24/30.1]? HST V-band AB magnitudemagphot.mag;em.opt.Rfloatnullablee_Vmag[0.02/5.3]? Vmag uncertaintymagstat.error;phot.mag;em.opt.VfloatnullableSep[0.01/0.7]? Distance between ACS and ground-based centroidsarcsecpos;arith.difffloatnullableRe[0.02/0.5]? Half-light radius computed by PHOT (2)arcsecphys.angSize;meta.modelledfloatnullableSCatCross-match with GOODS and Cat. J/ApJ/744/110 within 1"meta.ref.urlintnullableJ/ApJ/753/95/laecompLAE component propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzRedshift of the LAE sample (2.1 for table4 or 3.1 for table 5)src.redshift;pos.heliocentricfloatnullableIDSource identification (G1)meta.id;meta.maincharm_ID[1/4] Component numbermeta.code.multipintSurveySurvey identification (GEMS, GOODS or HUDF)meta.idcharRAJ2000[3] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[27/28] Degree of declination (J2000)pos.eq.dec;meta.mainVmag[24.5/29.5] HST V-band AB magnitude (SExtractor)magphot.mag;em.opt.Rfloate_Vmag[0.01/0.3] Vmag uncertaintymagstat.error;phot.mag;em.opt.VfloatSep[0.01/0.6] Distance from ground-based Ly{alpha} positionarcsecpos;arith.difffloatb/a[0.2/1] Isophotal axis ratio computed by SExtractorphys.angSize;arith.ratiofloattheta[-90/88] Isophotal position angle computed by SExtractordegpos.posAng;meta.modelledfloatRe[0.05/0.3] Half-light radius computed by SExtractorarcsecphys.angSize;meta.modelledfloatSFR[0.05/5.3] UV star formation ratesolMass/yrmeta.idfloat