J/ApJ/743/9 z=3.1 LAEs morphological properties (Gronwall+, 2011) ================================================================================ The rest-frame ultraviolet light profile shapes of Ly{alpha}-emitting galaxies at z = 3.1. Gronwall C., Bond N.A., Ciardullo R., Gawiser E., Altmann M., Blanc G.A., Feldmeier J.J. =2011ApJ...743....9G ================================================================================ ADC_Keywords: Galaxies, photometry ; Morphology ; Redshifts Keywords: cosmology: observations - galaxies: formation - galaxies: high-redshift - galaxies: structure Abstract: We 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 (02 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. Description: Our study uses the statistically complete sample of z=3.1 LAEs identified by Gronwall et al. (2007, Cat. J/ApJ/667/79) in their narrowband 4990{AA} survey of the Extended Chandra Deep Field-South (ECDF-S). As explained in Paper I (Bond et al. 2009, Cat. J/ApJ/705/639), the sample contains 154 LAEs in a 0.32deg^2^ area of sky, and 116 of the objects fall in fields observed by HST. To summarize: the GEMS (Rix et al. 2004ApJS..152..163R) survey includes 97 LAEs and reaches a V-band 5{sigma} point-source depth of 28.3mag, the GOODS (Giavalisco et al. 2004, Cat. II/261) survey (Ver. 2.0) contains 29 LAEs and goes to a point-source depth of V=28.8, and HUDF (Beckwith et al. 2006, Cat. J/AJ/132/1729) contains 3 LAEs and reaches a depth of V=30.2. In addition, the GEMS survey includes the first epoch of GOODS observations which reach a depth of V=27.9. We retrieved V_606_-band ACS images from the Multimission Archive at the Space Telescope Science Institute (MAST). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 85 64 LAE component morphological properties table2.dat 61 76 LAE system morphological properties -------------------------------------------------------------------------------- See also: B/hst : HST Archived Exposures Catalog (STScI, 2007) II/261 : GOODS initial results (Giavalisco+, 2004) J/ApJ/736/31 : HETDEX pilot survey. II. 1.9 in Simbad). Note (G2): Following Conselice (2003, Cat. J/ApJS/147/1), we define this index via C=5xlog(r_80%_/r_20%_), where r_80%_ and r_20%_ are the circular radii containing 80% and 20% of the total flux. Table 1 lists these values for each resolved LAE component, and Table 2 gives the measurements for LAE systems. Missing entries in the table represent extremely faint sources, for which we were unable to calculate a value. -------------------------------------------------------------------------------- History: From electronic version of the journal References: Bond et al. Paper I. 2009ApJ...705..639B Cat. J/ApJ/705/639 ================================================================================ (End) Emmanuelle Perret [CDS] 26-Apr-2013