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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2020

A quantitative demonstration that stellar feedback locally regulates galaxy growth

Javier Zaragoza-Cardiel
  • Fonction : Auteur
Jacopo Fritz
  • Fonction : Auteur
Itziar Aretxaga
  • Fonction : Auteur
Yalia D. Mayya
  • Fonction : Auteur
Daniel Rosa-González
  • Fonction : Auteur
John E. Beckman
  • Fonction : Auteur
Gustavo Bruzual
  • Fonction : Auteur

Résumé

We have applied stellar population synthesis to 500-pc-sized regions in a sample of 102 galaxy discs observed with the MUSE spectrograph. We derived the star formation history and analyse specifically the ‘recent’ (⁠|$20\,\rm {Myr}$|⁠) and ‘past’ (⁠|$570\,\rm {Myr}$|⁠) age bins. Using a star formation self-regulator model, we can derive local mass-loading factors, η for specific regions, and find that this factor depends on the local stellar mass surface density, Σ_*, in agreement with the predictions form hydrodynamical simulations including supernova feedback. We integrate the local η–Σ_* relation using the stellar mass surface density profiles from the Spitzer Survey of Stellar Structure in Galaxies (S4G) to derive global mass-loading factors, η_G, as a function of stellar mass, M_*. The η_G–M_* relation found is in very good agreement with hydrodynamical cosmological zoom-in galaxy simulations. The method developed here offers a powerful way of testing different implementations of stellar feedback, to check on how realistic are their predictions.
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Dates et versions

hal-02973229 , version 1 (22-05-2024)

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Javier Zaragoza-Cardiel, Jacopo Fritz, Itziar Aretxaga, Yalia D. Mayya, Daniel Rosa-González, et al.. A quantitative demonstration that stellar feedback locally regulates galaxy growth. Monthly Notices of the Royal Astronomical Society, 2020, 499 (1), pp.1172-1187. ⟨10.1093/mnras/staa2906⟩. ⟨hal-02973229⟩
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