2024
DOI: 10.1093/mnras/stae1739
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Age and metal gradients in massive quiescent galaxies at 0.6 ≲ z ≲ 1.0: implications for quenching and assembly histories

Chloe M Cheng,
Mariska Kriek,
Aliza G Beverage
et al.

Abstract: We present spatially resolved, SSP-equivalent ages, stellar metallicities, and abundance ratios for 456 massive (10.3 ≲ log (M*/M⊙) ≲ 11.8) quiescent galaxies at 0.6 ≲ z ≲ 1.0 from the LEGA-C survey, derived using full-spectrum models. Typically, we find flat age and [Mg/Fe] gradients, and negative [Fe/H] gradients, implying iron-rich cores. We also estimate intrinsic [Fe/H] gradients via forward-modeling. We examine the observed gradients in three age bins. Younger quiescent galaxies typically have negative [… Show more

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