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April 25, 2026Monthly Notices of the Royal Astronomical SocietyOpen Access

Growing in number, passive in nature: tracing the evolution of the most massive quiescent galaxies since z ∼ 0.8 with BOSS and DESI

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Authors

FDF R DitraniMFM FossatiMLM Longhetti

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Overview

Randomized trial shows passive evolution of massive quiescent galaxies, indicating minimal change over cosmic time.

Key Points

  • This research aims to analyze the evolution of the most massive quiescent galaxies at various redshifts.
  • Exploited BOSS and DESI spectroscopic datasets to analyze LRGs with log (M*/M⊙) > 11.5.
  • Mapped stellar population properties consistently across redshifts (0.15 < z < 0.8).
  • Measured trends in [Fe/H], [α/Fe], and light-weighted age as a function of redshift.
  • Massive quiescent galaxies exhibited passive light-weighted age evolution.
  • Observed flat [Fe/H] and [α/Fe] trends towards lower redshift, supporting predictions from IllustrisTNG.
  • Despite a 3-4x increase in number density, stellar population properties changed negligibly since z ∼ 0.8.

Cite This Study

Ditrani et al. (2026) studied this question.

synapsesocial.com/papers/69ec5a8888ba6daa22dac157https://doi.org/10.1093/mnras/stag766
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