The mean absorption due to the Lyα forest in the spectra of high redshift highly luminous quasars

Details The mean absorption due to the Lyα forest in the spectra of high redshift highly luminous quasars The mean absorption due to the Lyα forest in the spectra of high redshift highly luminous quasars

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..315a&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Lyα forest is an absorption phenomenon seen in the spectra of high redshift quasars (QSOs). It is the only direct observational evidence of the existence of a pervasive intergalactic medium (IGM), which is believed to contain, at high redshift, most of the baryonic matter of the universe. In this paper, we first present our new observations of high redshift highly luminous QSOs (m ≤ 16.70 and 2.62 ≤ zem ≤ 3.91) in the Northern Hemisphere, obtained with the CARELEC spectrograph at the OHP. We then use these observations to determine the redshift evolution of the mean absorption in the Lyα forest.

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