Unveiling the (in)consistencies among the galaxy stellar mass function, star formation histories, satellite abundances and intracluster light from a semi-empirical perspective - Faculté des Sciences de Sorbonne Université Accéder directement au contenu
Article Dans Une Revue Mon.Not.Roy.Astron.Soc. Année : 2024

Unveiling the (in)consistencies among the galaxy stellar mass function, star formation histories, satellite abundances and intracluster light from a semi-empirical perspective

Hao Fu
  • Fonction : Auteur
Francesco Shankar
  • Fonction : Auteur
Mohammadreza Ayromlou
  • Fonction : Auteur
Ioanna Koutsouridou
  • Fonction : Auteur
Caroline Bertemes
  • Fonction : Auteur
Sabine Bellstedt
  • Fonction : Auteur
Ignacio Martín-Navarro
  • Fonction : Auteur
Joel Leja
  • Fonction : Auteur
Viola Allevato
  • Fonction : Auteur
Mariangela Bernardi
  • Fonction : Auteur
Lumen Boco
  • Fonction : Auteur
Paola Dimauro
  • Fonction : Auteur
Carlotta Gruppioni
  • Fonction : Auteur
Andrea Lapi
  • Fonction : Auteur
Nicola Menci
  • Fonction : Auteur
Iván Muñoz Rodríguez
  • Fonction : Auteur
Annagrazia Puglisi
  • Fonction : Auteur
Alba V Alonso-Tetilla
  • Fonction : Auteur

Résumé

In a hierarchical, dark matter-dominated Universe, stellar mass functions (SMFs), galaxy merger rates, star formation histories (SFHs), satellite abundances, and intracluster light, should all be intimately connected observables. However, the systematics affecting observations still prevent universal and uniform measurements of, for example, the SMF and the SFHs, inevitably preventing theoretical models to compare with multiple data sets robustly and simultaneously. We here present our holistic semi-empirical model DECODE (Discrete statistical sEmi-empiriCal mODEl) that converts via abundance matching dark matter merger trees into galaxy assembly histories, using different SMFs in input and predicting all other observables in output in a fully data-driven and self-consistent fashion with minimal assumptions. We find that: 1) weakly evolving or nearly constant SMFs below the knee ($M_\star \lesssim 10^{11} \, M_\odot$) are the best suited to generate star formation histories aligned with those inferred from MaNGA, SDSS, GAMA, and, more recently, JWST; 2) the evolution of satellites after infall only affects the satellite abundances and star formation histories of massive central galaxies but not their merger histories; 3) the resulting SFR-$M_\star$ relation is lower in normalization by a factor of $\sim 2$ with respect to observations, with a flattening at high masses more pronounced in the presence of mergers; 4) the latest data on intracluster light can be reproduced if mass loss from mergers is included in the models. Our findings are pivotal in acting as pathfinder to test the self-consistency of the high-quality data from, e.g., JWST and Euclid.
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hal-04634798 , version 1 (26-07-2024)

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Hao Fu, Francesco Shankar, Mohammadreza Ayromlou, Ioanna Koutsouridou, Andrea Cattaneo, et al.. Unveiling the (in)consistencies among the galaxy stellar mass function, star formation histories, satellite abundances and intracluster light from a semi-empirical perspective. Mon.Not.Roy.Astron.Soc., 2024, 532 (1), pp.177-197. ⟨10.1093/mnras/stae1492⟩. ⟨hal-04634798⟩
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