The ALPINE-ALMA [C ii] Survey: kinematic diversity and rotation in massive star-forming galaxies at z ~ 4.4–5.9 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2021

The ALPINE-ALMA [C ii] Survey: kinematic diversity and rotation in massive star-forming galaxies at z ~ 4.4–5.9

G.C. Jones
  • Fonction : Auteur
D. Vergani
  • Fonction : Auteur
M. Romano
  • Fonction : Auteur
M. Ginolfi
  • Fonction : Auteur
Y. Fudamoto
  • Fonction : Auteur
S. Fujimoto
  • Fonction : Auteur
B.C. Lemaux
  • Fonction : Auteur
L. Morselli
  • Fonction : Auteur
P. Capak
P. Cassata
  • Fonction : Auteur
A. Faisst
  • Fonction : Auteur
D. Schaerer
  • Fonction : Auteur
J.D. Silverman
  • Fonction : Auteur
Lin Yan
M. Boquien
A. Cimatti
M. Dessauges-Zavadsky
  • Fonction : Auteur
E. Ibar
  • Fonction : Auteur
R. Maiolino
  • Fonction : Auteur
F. Rizzo
  • Fonction : Auteur
M. Talia
  • Fonction : Auteur
G. Zamorani

Résumé

While the kinematics of galaxies up to z ∼ 3 have been characterized in detail, only a handful of galaxies at high redshift (z > 4) have been examined in such a way. The Atacama Large Millimeter/submillimeter Array (ALMA) Large Program to INvestigate [C ii] at Early times (ALPINE) survey observed a statistically significant sample of 118 star-forming main-sequence galaxies at z = 4.4–5.9 in [C ii]158 |$\mu$|m emission, increasing the number of such observations by nearly 10×. A preliminary qualitative classification of these sources revealed a diversity of kinematic types (i.e. rotators, mergers, and dispersion-dominated systems). In this work, we supplement the initial classification by applying quantitative analyses to the ALPINE data: a tilted ring model (TRM) fitting code (^3Dbarolo), a morphological classification (Gini-M_20), and a set of disc identification criteria. Of the 75 [C ii]-detected ALPINE galaxies, 29 are detected at sufficient significance and spatial resolution to allow for TRM fitting and the derivation of morphological and kinematic parameters. These 29 sources constitute a high-mass subset of the ALPINE sample (⁠|$M_*\gt 10^{9.5}\, \mathrm{M}_{\odot }$|⁠). We robustly classify 14 of these sources (six rotators, five mergers, and three dispersion-dominated systems); the remaining sources showing complex behaviour. By exploring the G-M_20 of z > 4 rest-frame far-infrared and [C ii] data for the first time, we find that our 1 arcsec ∼ 6 kpc resolution data alone are insufficient to separate galaxy types. We compare the rotation curves and dynamical mass profiles of the six ALPINE rotators to the two previously detected z ∼ 4–6 unlensed main-sequence rotators, finding high rotational velocities (∼50–250 km s^−1) and a diversity of rotation curve shapes.
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hal-03210320 , version 1 (04-05-2023)

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G.C. Jones, D. Vergani, M. Romano, M. Ginolfi, Y. Fudamoto, et al.. The ALPINE-ALMA [C ii] Survey: kinematic diversity and rotation in massive star-forming galaxies at z ~ 4.4–5.9. Monthly Notices of the Royal Astronomical Society, 2021, 507 (3), pp.3540-3563. ⟨10.1093/mnras/stab2226⟩. ⟨hal-03210320⟩
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