ZFIRE: 3D modeling of rotation, dispersion, and angular momentum of star-forming galaxies at z ~ 2

We perform a kinematic and morphological analysis of 44 star-forming galaxies at z similar to 2 in the COSMOS legacy field using near-infrared spectroscopy from Keck/MOSFIRE and F160W imaging from CANDELS/3D-HST as part of the ZFIRE survey. Our sample consists of cluster and field galaxies from 2.0 < z < 2.5 with K-band multiobject slit spectroscopic measurements of their H alpha emission lines. Ha rotational velocities and gas velocity dispersions are measured using the Heidelberg Emission Line Algorithm (HELA), which compares directly to simulated 3D data cubes. Using a suite of simulated emission lines, we determine that HELA reliably recovers input S-0.5 and angular momentum at small offsets, but V-2.2/sigma(g) values are offset and highly scattered. We examine the role of regular and irregular morphology in the stellar mass kinematic scaling relations, deriving the kinematic measurement S-0.5, and finding log(S-0.5)=(0.38 +/- 0.07) log(M/M circle dot - 10)+(2.04 +/- 0.03) with no significant offset between morphological populations and similar levels of scatter (similar to 0.16 dex). Additionally, we identify a correlation between M star and V2.2/sigma(g) for the total sample, showing an increasing level of rotation dominance with increasing M star, and a high level of scatter for both regular and irregular galaxies. We estimate the specific angular momenta (j(disk)) of these galaxies and find a slope of 0.36 +/- 0.12, shallower than predicted without mass-dependent disk growth, but this result is possibly due to measurement uncertainty at M star < 9.5 However, through a Kolmogorov-Smirnov test we find irregular galaxies to have marginally higher j(disk) values than regular galaxies, and high scatter at low masses in both populations.