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- W2131092114 abstract "We report the near-IR detection of a prominent CIV absorption in the rest-frame UV spectrum of the most distant known QSO, SDSS J104433.04-012502.2, at $z=5.80$. This QSO was recently observed with XMM-Newton and it was found to be notably X-ray weak. The equivalent width of the CIV absorption feature (~10 A) strongly supports the idea that the X-ray faintness of this QSO is due to heavy absorption by gas with a column density $N_{rm H} > 10^{24}$ cm -2 . The shape of the CIV feature suggests that this is a Broad Absorption Line QSO. Although absorbed by a huge column of gas, the observed continuum in the 0.9-2.4 μ m range (~1300-3500 Arest frame) exactly matches the template of unabsorbed QSOs without invoking any reddening ($E_{B-V}< 0.08$ mag), indicating that dust in the absorbing gas is either absent or composed of large grains." @default.
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- W2131092114 date "2001-06-01" @default.
- W2131092114 modified "2023-09-24" @default.
- W2131092114 title "Discovery of strong CIV absorption in the highest redshift quasar" @default.
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- W2131092114 doi "https://doi.org/10.1051/0004-6361:20010523" @default.
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