Rotation curves in z ∼ 1–2 star-forming disks: comparison of dark matter 
fractions and disk properties for different fitting methods

Price, S. H.; Shimizu, T. T.; Genzel, R.; Übler, H.; Förster Schreiber, N. M.; Tacconi, L. J.; Davies, R. I.; Coogan, R. T.; Lutz, D.; Wuyts, S.; Wisnioski, E.; Nestor, A.; Sternberg, A.; Burkert, A.; Bender, R.; Contursi, A.; Davies, R. L.; Herrera-Camus, R.; Lee, M.-J.; Naab, T.; Neri, R.; Renzini, A.; Saglia, R.; Schruba, A.; Schuster, K.

doi:10.3847/1538-4357/ac22ad

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Rotation curves in z ∼ 1–2 star-forming disks: comparison of dark matter fractions and disk properties for different fitting methods

MPG-Autoren

/persons/resource/persons216308

Price, S. H.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons206401

Shimizu, T. T.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4590

Genzel, R.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons128736

Übler, H.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4923

Förster Schreiber, N. M.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4582

Tacconi, L. J.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4586

Davies, R. I.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons254976

Coogan, R. T.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4584

Lutz, D.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons25791

Sternberg, A.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4602

Burkert, A.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4759

Bender, R.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons16298

Contursi, A.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons238635

Lee, M.-J.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons18398

Saglia, R.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons145964

Schruba, A.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Zitation

Price, S. H., Shimizu, T. T., Genzel, R., Übler, H., Förster Schreiber, N. M., Tacconi, L. J., et al. (2021). Rotation curves in z ∼ 1–2 star-forming disks: comparison of dark matter fractions and disk properties for different fitting methods. The Astrophysical Journal, 922(2): 143. doi:10.3847/1538-4357/ac22ad.

Zitierlink: https://hdl.handle.net/21.11116/0000-0009-E200-7

Zusammenfassung

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