Rotation Curves in z ∼ 1–2 Star-forming Disks: Comparison of Dark Matter Fractions and Disk Properties for Different Fitting Methods

We present a follow-up analysis examining the dynamics and structures of 41 massive, large star-forming galaxies at z~0.67-2.45 using both ionized molecular gas kinematics. fit galaxy with models consisting bulge, thick, turbulent disk, NFW dark matter halo, code that fully forward kinematics, including all observational instrumental effects. explore parameter space Markov Chain Monte Carlo (MCMC) sampling, priors based on stellar masses disk sizes. full sample extracted 1D kinematic profiles. For subset 14 well-resolved galaxies, we also 2D The MCMC approach robustly confirms results from least-squares fitting presented in Paper I (Genzel et al. 2020): tend to be baryon-rich galactic scales (within one effective radius). are good agreement for subset, demonstrating much dynamical information is captured along major axis. kinematics more affected by presence non-circular motions, which illustrate constructing toy model constant inflow exhibits residual signatures consistent radial motions. This analysis, together other studies, strengthens finding z~1-2 baryon-dominated scales, lower fractions towards higher baryonic surface densities. Finally, details used this analysis.