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机译:A principal component analysis of quasar UV spectra at z ~ 3
APC, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France;
CEA, Centre de Saclay, Irfu/SPP, 91191 Gif-sur-Yvette, France;
UPMC Univ Paris06, Institut d'Astrophysique de Paris, UMR 7095-CNRS, 75014 Paris, France;
Intergalactic medium; Methods: numerical; Quasars: absorption lines; Quasars: emission lines;