BIANCHI, SimoneSimoneBIANCHICRISTIANI, StefanoStefanoCRISTIANIKim, Tae-SunTae-SunKimD'Odorico, SandroSandroD'Odorico2024-01-252024-01-2520033-540-40179-21431-2433http://hdl.handle.net/20.500.12386/34625The remarkable efficiency of the Ultra-Violet Echelle Spectrograph (UVES) at the VLT has made it possible to push high-resolution, high-S/N ground observations of the Lyα forest down to z ∼ 1.5, gaining new insight into the physical state of the intergalactic medium (IGM) and its evolution over more than 90% of the cosmic time. The results presented here are based on recent UVES observations of the spectra of 8 QSOs, covering the Lyα forest at 1.5 < z_{Lyα} < 3.6 with S/N ∼ 40-50 and resolution R ∼ 45000 [1,2]. The absorption lines were fit to the Voigt profiles to derive the three line parameters: absorption redshift, z, the HI column density, N <SUB> HI </SUB> in cm<SUP>-2</SUP>, and the Doppler parameters, b in km s<SUP>-1</SUP>.STAMPAenConference paper10.1007/10857580_35https://link.springer.com/chapter/10.1007/10857580_352003acfp.conf..417BFIS/05 - ASTRONOMIA E ASTROFISICA