Diagnosing DASH: A Catalog of Structural Properties for the COSMOS-DASH Survey

Abstract We present the H 160 morphological catalogs for COSMOS-DASH survey, largest area near-IR survey using HST-WFC3 to date. Utilizing “Drift And SHift” observing technique imaging, imaged approximately 0.5 deg 2 of UltraVISTA deep stripes (0.7 , when combined with archival data). Global structural parameters are measured 51,586 galaxies within GALFIT (excluding CANDELS area) detection a multi-band HST image. recover consistent results those from deeper 3D-HST catalogs, finding that, in general, sizes and Sérsic indices typical accurate limiting magnitudes < 23 22 ABmag, respectively. In size-mass parameter space, demonstrate robust measurements out z ∼ down log ( M ⋆ stretchy="true">/ ⊙ stretchy="false">) ∼ 9 . With advantage larger COSMOS-DASH, we measure flattening quiescent relation below 10.5$?> 10.5 that persists 2. show environment is not primary driver this flattening, at least = 1.2, whereas internal physical processes may instead govern evolution.