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• W3102932154 endingPage "85" @default.
• W3102932154 startingPage "85" @default.
• W3102932154 abstract "We present the results of a 42-orbit HST/WFC3 survey of the rest-frame optical morphologies of star forming galaxies with spectroscopic redshifts in the range z=1.5-3.6. The survey consists of 42 orbits of F160W imaging covering ~65 arcmin^2 distributed widely across the sky and reaching a depth of 27.9 AB for a 5 sigma detection within a 0.2 arcsec radius aperture. Focusing on an optically selected sample of 306 star forming galaxies with stellar masses in the range M* = 10^9 - 10^11 Msun, we find that typical circularized effective half-light radii range from ~ 0.7 - 3.0 kpc and describe a stellar mass - radius relation as early as z ~ 3. While these galaxies are best described by an exponential surface brightness profile, their distribution of axis ratios is strongly inconsistent with a population of inclined exponential disks and is better reproduced by triaxial stellar systems with minor/major and intermediate/major axis ratios ~ 0.3 and 0.7 respectively. While rest-UV and rest-optical morphologies are generally similar for a subset of galaxies with HST/ACS imaging data, differences are more pronounced at higher masses M* > 3 x 10^10 Msun. Finally, we discuss galaxy morphology in the context of efforts to constrain the merger fraction, finding that morphologically-identified mergers/non-mergers generally have insignificant differences in terms of physical observables such as stellar mass and star formation rate, although merger-like galaxies selected according to some criteria have statistically smaller effective radii and correspondingly larger SFR surface density." @default.
• W3102932154 created "2020-11-23" @default.
• W3102932154 creator A5028023592 @default.
• W3102932154 creator A5049745927 @default.
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• W3102932154 creator A5058134429 @default.
• W3102932154 creator A5075633773 @default.
• W3102932154 creator A5083424766 @default.
• W3102932154 date "2012-01-03" @default.
• W3102932154 modified "2023-10-03" @default.
• W3102932154 title "AN<i>HST</i>/WFC3-IR MORPHOLOGICAL SURVEY OF GALAXIES AT<i>z</i>= 1.5-3.6. I. SURVEY DESCRIPTION AND MORPHOLOGICAL PROPERTIES OF STAR-FORMING GALAXIES" @default.
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