X-shooter, with its characteristics of resolution, spectral coverage and efficiency, provides a unique opportunity to obtain spectra of the highest-redshift quasars (z ~ 6) that will allow us to carry out successful investigations on key cosmological issues, from the details of the re-ionization process, to the evolution of the first galaxies and AGNs. In this paper, we present the spectra of three z ~ 6 quasars: one obtained during the commissioning of X-shooter and two in the context of our ongoing GTO programme. Combining this sample with data in the literature, we update the value of the C IV cosmic mass density in the range 4.5 < z < 5, confirming the constant trend with redshift between 2.5 and 5.
Optical-NIR spectra of quasars close to reionization (z˜ 6) / D'Odorico, V.; Cupani, G.; Cristiani, S.; Maiolino, R.; Molaro, P.; Nonino, M.; Cimatti, A.; di Serego Alighieri, S.; Fiore, F.; Fontana, A.; Gallerani, S.; Giallongo, E.; Mannucci, F.; Marconi, A.; Pentericci, L.; Viel, M.; Vladilo, G.. - In: ASTRONOMISCHE NACHRICHTEN. - ISSN 0004-6337. - 332:3(2011), pp. 315-318. [10.1002/asna.201111545]
Optical-NIR spectra of quasars close to reionization (z˜ 6)
Viel, M.;
2011-01-01
Abstract
X-shooter, with its characteristics of resolution, spectral coverage and efficiency, provides a unique opportunity to obtain spectra of the highest-redshift quasars (z ~ 6) that will allow us to carry out successful investigations on key cosmological issues, from the details of the re-ionization process, to the evolution of the first galaxies and AGNs. In this paper, we present the spectra of three z ~ 6 quasars: one obtained during the commissioning of X-shooter and two in the context of our ongoing GTO programme. Combining this sample with data in the literature, we update the value of the C IV cosmic mass density in the range 4.5 < z < 5, confirming the constant trend with redshift between 2.5 and 5.File | Dimensione | Formato | |
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