Figure 4 from On the Evolution of the Central Density of Quiescent Galaxies

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On the Evolution of the Central Density of Quiescent Galaxies

Authors: Sandro Tacchella, C. Marcella Carollo, S. M. Faber, Anna Cibinel, Avishai Dekel, David C. Koo, Alvio Renzini, and Joanna Woo

2017 The Astrophysical Journal Letters 844 L1.

Provider: AAS Journals

Caption: Figure 4.

At a given M_⋆, QGs with a higher Σ₁ are older. We plot Σ₁ vs. M_⋆ for QGs, color coded by the three mass-weighted age bins of Figure 3. Galaxies above the Σ₁ ridgeline, indicated with the black line, are older than similar-mass galaxies below this line. The inset shows the distribution of distances from the Σ₁ ridgeline for the three age categories.

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