SIBELIUS-DARK: a galaxy catalogue of the local volume from a constrained realization simulation - Archive ouverte HAL
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2022

SIBELIUS-DARK: a galaxy catalogue of the local volume from a constrained realization simulation

Stuart Mcalpine
John C. Helly
  • Fonction : Auteur
Matthieu Schaller
Till Sawala
  • Fonction : Auteur
Guilhem Lavaux
Jens Jasche
  • Fonction : Auteur
Carlos S. Frenk
  • Fonction : Auteur
Adrian Jenkins
John R. Lucey
  • Fonction : Auteur
Peter H. Johansson
  • Fonction : Auteur

Résumé

We present sibelius-dark, a constrained realization simulation of the local volume to a distance of 200 Mpc from the Milky Way. sibelius-dark is the first study of the ‘Simulations Beyond The Local Universe’ (sibelius) project, which has the goal of embedding a model Local Group-like system within the correct cosmic environment. The simulation is dark-matter-only, with the galaxy population calculated using the semi-analytic model of galaxy formation, galform. We demonstrate that the large-scale structure that emerges from the sibelius constrained initial conditions matches well the observational data. The inferred galaxy population of sibelius-dark also match well the observational data, both statistically for the whole volume and on an object-by-object basis for the most massive clusters. For example, the K-band number counts across the whole sky, and when divided between the northern and southern Galactic hemispheres, are well reproduced by sibelius-dark. We find that the local volume is somewhat unusual in the wider context of ΛCDM: it contains an abnormally high number of supermassive clusters, as well as an overall large-scale underdensity at the level of ≈5 per cent relative to the cosmic mean. However, whilst rare, the extent of these peculiarities does not significantly challenge the ΛCDM model. sibelius-dark is the most comprehensive constrained realization simulation of the local volume to date, and with this paper we publicly release the halo and galaxy catalogues at z = 0, which we hope will be useful to the wider astronomy community.
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Dates et versions

hal-03597289 , version 1 (07-04-2023)

Identifiants

Citer

Stuart Mcalpine, John C. Helly, Matthieu Schaller, Till Sawala, Guilhem Lavaux, et al.. SIBELIUS-DARK: a galaxy catalogue of the local volume from a constrained realization simulation. Monthly Notices of the Royal Astronomical Society, 2022, 512 (4), pp.5823-5847. ⟨10.1093/mnras/stac295⟩. ⟨hal-03597289⟩
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