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http://hdl.handle.net/20.500.12386/34625
Title: | QSO Absorption Lines as a Cosmological Probe: Exploring the Lyman Forest with VLT/UVES | Authors: | BIANCHI, Simone CRISTIANI, Stefano Kim, Tae-Sun D'Odorico, Sandro |
Issue Date: | 2003 | Journal: | ESO ASTROPHYSICS SYMPOSIA | Volume: | Astronomy, Cosmology and Fundamental Physics Proceedings of the ESO/CERN/ESA Symposium | Editors: | Shaver, Peter A.; Di Lella, Luigi; Giménez, Alvaro | Series: | ESO ASTROPHYSICS SYMPOSIA | First Page: | 417 | Abstract: | The 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>. | Conference Name: | Astronomy, Cosmology and Fundamental Physics | Conference Place: | Garching, Germany | Conference Date: | 4-7 March, 2002 | URI: | http://hdl.handle.net/20.500.12386/34625 | URL: | https://link.springer.com/chapter/10.1007/10857580_35 | ISSN: | 1431-2433 | ISBN: | 3-540-40179-2 | DOI: | 10.1007/10857580_35 | Bibcode ADS: | 2003acfp.conf..417B | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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bianchi.pdf | preprint | 199.05 kB | Adobe PDF | View/Open |
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