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Creators/Authors contains: "Steel, Cecilia"

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  1. ; ; ; (, Research Notes of the AAS)
    Abstract In this work, we compare star formation histories of massive (10.5 < log ( M * / M ⊙ ) < 12) galaxies in the UniverseMachine model to those measured from the Large Early Galaxy Astrophysics Census (LEGA-C) at 0.6 < z < 1. Following the LEGA-C study, we investigate how 50% (t50) and 90% (t90) formation timescales depend on total stellar mass. We find good agreement between the observed and model timescales for the star-forming population Δ tSF ≲ 1 Gyr across the full mass range. In contrast, the observed age-mass correlation is weaker for the quiescent population compared to UniverseMachine models (ΔtQ ≲ 2 Gyr), especially at the high-mass end. This indicates continued star formation or additional processes in the most massive quiescent galaxies, a behavior not accounted for in the UniverseMachine model. 
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