Based on
observations carried out at the European
Southern Observatory (ESO), under visitor mode progs. ID 65.O-0063, 66.A-0624,
67.A-0078 and 68.A-0600 with the UVES echelle
spectrograph installed at the ESO Very Large Telescope (VLT), unit
Kueyen, on mount Paranal in Chile. Also based on archival data from progs. 68.A-0492
(PI: D'Odorico), 68.B-0115 (PI: Molaro) and 69.A-0051 (PI: Pettini).
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