First results from the TNG50 simulation: the evolution of stellar and gaseous discs across cosmic time

Abstract We present a new cosmological, magnetohydrodynamical simulation for galaxy formation: TNG50, the third and final instalment of the IllustrisTNG project. TNG50 evolves 2 × 21603 dark matter particles and gas cells in a volume 50 comoving Mpc across. It hence reaches a numerical resolution typical of zoom-in simulations, with a baryonic element mass of $8.5\times 10^4\, {\rm M}_{\odot }$ and an average cell size of 70–140 pc in the star-forming regions of galaxies. Simultaneously, TNG50 samples ∼700 (6500) galaxies with stellar masses above $10^{10} \, (10^8)\, {\rm M}_{\odot }$ at $z$ = 1. Here we investigate the structural and kinematical evolution of star-forming galaxies across cosmic time (0 ≲ $z$…

• FH
  Flatiron Health
• BF
  Bundesministerium für Bildung und Forschung
• FJ
  Forschungszentrum Jülich
• MD
  Ministero dell’Istruzione, dell’Università e della Ricerca

  Award: H2020
• BS
  Bayerisches Staatsministerium für Wissenschaft, Forschung und Kunst
• BA
  Bayerische Akademie der Wissenschaften
• US
  Universität Stuttgart
• GC
  Gauss Centre for Supercomputing
• H2
  Horizon 2020 Framework Programme

  Award: 683184
• HE
  H2020 European Research Council

  Awards: 683184, H2020