Cosmic evolution of the stellar mass volume density, ρ⋆ (black stars), obtained with M⋆(t) (corrected for mass loss); (black line) obtained with (t) (mass formed). Orange points are from the GAMA survey by Driver et al. (2017). The gray line is from Madau & Dickinson (2014), gray squares are from Panter et al. (2007), and gray dots are from different galaxy surveys as explained in the text. Blue and red stars represent the contribution to ρ⋆ from the galaxy outer regions, 1 ≤ R ≤ 2 HLR, and inner regions, R ≤ 0.5 HLR, respectively.
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