0 Assigned ID: 1245 ----- Attempting Submission 1 (Thu Feb 28 17:45:50 GMT 2013) ----- HST Phase I Proposal 1245 (Archival_LAEMorph_2013_full.pdf.apt) successfully submitted. ----- Attempting Submission 2 (Fri Mar 01 21:26:06 GMT 2013) ----- HST Phase I Proposal 1245 (Archival_LAEMorph_2013_full.pdf.apt) successfully submitted. ----- Attempting Submission 3 (Fri Mar 01 23:58:21 GMT 2013) ----- Lyman Alpha Emitting galaxies (LAEs) seen at redshifts 2 and 3 are progenitors of typical present-day galaxies like the Milky Way seen in their initial stage of star formation. LAEs are younger, lower in mass, and less chemically evolved than the better-studied Lyman break galaxies (LBGs), and HST imaging probes the physical properties of these objects at sub-kiloparsec resolution. We will use archival WFC3-NIR images of the HUDF, CANDELS GOODS-S, and ERS GOODS-S to study the rest-frame optical morphology of 66 Lyman Alpha Emitters at z=2.1 and z=3.1, along with comparison samples of star-forming BzK galaxies and Lyman break galaxies at similar redshifts. For objects with sufficient signal-to-noise, we will determine Sersic profiles, CAS (Concentration/Asymmetry/clumpinesS), and internal color dispersions. We will use an existing pipeline, which we developed and applied to rest-UV ACS images of these galaxies, enabling object-by-object comparisons of rest-optical and rest-UV morphology. Our results will reveal the nature of star formation in low-mass high-redshift galaxies where the bulk of present-day stars were formed and will provide a crucial point of comparison to the morphology of continuum-selected galaxies studied by the CANDELS team. We will illustrate if the distribution between clumpy and/or merger-driven star formation is correlated with galaxy properties such as mass or dust extinction. Our results will also improve the interpretation of morphological studies at z>4, where only rest-UV HST images are available. It will also allow for evolutionary comparisons with rest-UV morphologies at lower redshifts that are underway from UVUDF. COSMOLOGY Default Medium false false false false false SUPPORTED