... 0515-4414(Obj)

Based on observations performed at the VLT Kueyen telescope (ESO, Paranal, Chile). The data are retrieved from the ESO/ST-ECF Science Archive Facility.

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... elements

A chemical element is called primary/secondary if its massfraction ejected from a star is insensitive/ sensitive to the originalmetallicity of the star (Talbot & Arnett 1974).

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... $\sim$ 7.7-11.8 Gyr)

Assuming the cosmological expansion parameterized by t₀ = 13.8 Gyr, h = 0.7, $\Omega_{\rm m} = 0.3$, and $\Omega_\Lambda = 0.7$.

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...$] \simeq -0.99$

[A/B] $\equiv \log(N_{\rm A}/N_{\rm B}) - \log(N_{\rm A}/N_{\rm B})_\odot$.

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... (IS)

Defined as IS = $c~(\lambda_{13} - \lambda_{12})/\lambda_{12}$ (in km s^-1).

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... systems

The DLA population shows a remarkable similarity in the relative chemical abundances (Prochaska 2003).

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