J/ApJ/743/9ivo://CDS.VizieR/J/ApJ/743/9doi:10.26093/cds/vizier.17430009CDSGronwall C.Bond N.A.Ciardullo R.Gawiser E.Altmann M.Blanc G.A.,Feldmeier J.J.2017-12-12T14:44:36Z2013-05-28T15:18:20ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrygalaxy-classification-systemsredshiftedWe present a morphological analysis of the rest-frame ultraviolet emission of 78 resolved, high signal-to-noise z~3.1 Ly{alpha} emitters (LAEs) in the Extended Chandra Deep Field-South. Using Hubble Space Telescope/Advanced Camera for Surveys V-band images taken as part of the Galaxy Evolution from Morphology and SEDs, Great Observatories Origins Deep Survey, and Hubble Ultra Deep Field surveys, we investigate both single-component and multi-component LAEs, and derive concentration indices, Sersic indices, ellipticities, and half-light radii for all resolved components and systems with a signal-to-noise >30. We show that, although the LAE population is heterogeneous in nature, most LAEs are highly concentrated, with a distribution of C values similar to that measured for field stars; this suggests that the diagnostic is a poor discriminator near the resolution limit. The LAEs also display a wide range of Sersic indices (0<n<12), similar to that seen for galaxies in the local neighborhood. However, the majority of LAEs have n<2, and a visual inspection of the images suggests that the small-n objects have extended or multimodal luminosity profiles, while the LAEs with n>2 have compact components surrounded by diffuse emission. Moreover, unlike nearby spiral galaxies, whose distribution of ellipticities is flat, the LAE ellipticity distribution peaks near 1-b/a~0.55. Thus, the population has more in common with z~3 Lyman-break galaxies than local star-forming objects.2011ApJ...743....9Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/743/9CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)II/261 : GOODS initial results (Giavalisco+, 2004)J/ApJ/736/31 : HETDEX pilot survey. II. 1.9<z<3.8 LAEs (Blanc+, 2011)J/ApJ/705/639 : Paper I: Sizes of Lyman alpha emitters at z=3.1 (Bond+, 2009)J/ApJ/673/143 : HST photometry of TN J1338-1942 (Overzier+, 2008)J/ApJ/667/79 : Ly{alpha} emission-line galaxies at z=3.1 (Gronwall+, 2007)J/AJ/132/1729 : Hubble Ultra Deep Field BVI-dropout sources (Beckwith+, 2006)J/A+A/431/793 : Ly-alpha emitters around MRC 0316-257 (Venemans+, 2005)J/ApJ/631/85 : Galaxy morphologies in the Hubble UDF (Elmegreen+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/743/9https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/743/9http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/743/9https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/743/9https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/743/9http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/743/9GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/743/9/table1 (LAE component morphological properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/743/9/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/743/9/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/743/9/table1?GETtext/xml+votable180.050000true53.1699125-27.768354440.005555555555555556Cone search capability for table J/ApJ/743/9/table2 (LAE system morphological properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/743/9/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/743/9/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/743/9/table2?GETtext/xml+votable180.050000true53.1699375-27.768343060.0055555555555555566/35935 35957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/743/9?format=asciiOpticaldefaultJ/ApJ/743/9/table1LAE component morphological propertiesC[1.2/3.72]? Concentration index (G2)meta.code;spect.indexfloatnullableb/aAxis ratiophys.angSize;arith.ratiofloate_b/ab/a uncertaintystat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GCH2007][4/162] Object number (G1)meta.id;meta.mainintm_[GCH2007][1/4] Component numbermeta.code.multipintMNumber of morphological classifications for this sourcemeta.numberintSurveySurvey name (HUDF, GOODS or GEMS)meta.id;meta.datasetcharRAJ2000[3] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[27/28] Degree of declination (J2000)pos.eq.dec;meta.mainVGF[25.0/27.7] SExtractor total magnitude V_GF_magphot.mag;em.opt.Vfloate_VGFVGF uncertaintymagstat.errorfloatre[0.09/1.99] Half-light radius (r_e,GF_)kpcphys.size.radiusfloate_rere uncertaintykpcstat.errorfloatn[0.01/12.16] Sersic indexstat.fit.paramfloate_nn uncertaintystat.errorfloatPapIDisplay the data from Paper I (Bond et al., 2009, Cat. J/ApJ/705/639)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refcharJ/ApJ/743/9/table2LAE system morphological propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GCH2007][4/162] Object number (G1)meta.id;meta.mainintMNumber of morphological classifications for this sourcemeta.numberintSurveySurvey name (HUDF, GOODS or GEMS)meta.id;meta.datasetcharRAJ2000[3] Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000[27/28] Degree of declination (J2000) (1)pos.eq.dec;meta.mainVph[24.8/27] V-band magnitude computed by PHOTmagphot.mag;em.opt.Vfloate_VphVph uncertaintymagstat.errorfloatreph[0.55/2.56] Half-light radius (2)kpcphys.size.radiusfloatb/aIsophotal axis ratio about ACS centroidphys.angSize;arith.ratiofloatC[1.97/3.78]? Concentration index (G2)meta.code;spect.indexfloatnullablePapIDisplay the data from Paper I (Bond et al., 2009, Cat. J/ApJ/705/639)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar