Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981cha%26a...5..337c&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 5, Issue 3, p. 337-341.
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
Based on the spectra of 4 high-redshift quasars (resolution 2A) obtained by us [1-5] using IPCS on the RGO Cassegrain spectrograph of the AAT, we point out the following. 1. Auto-correlation peaks at Lα/Lβ and Lα/Lγ in PKS 0805+046 and PKS 1442+101 suggest that the large number of absorption lines shortward of Lα in high redshift quasars are due to absorption by hydrogen clouds. 2. The distribution of absorption lines and the correlation function of Lα/Lβ indicate that PKS 0528-250 may be an exception, requiring further observation. 3. Absorption redshift systems containing metallic lines may be produced by either matter ejected from the quasar, or an associated galaxy cluster or an intervening galaxy. 4. The randomness in the column density and the dispersion velocity deduced from the curve of growth of the Lα/Lβ pair supports the hypothesis that the pure Lα absorption comes from primitive hydrogen clouds in the early, exploding universe. 5. The number of hydrogen clouds per unit redshift interval is determined by the data of absorption lines of quasars with Z > 3.
Chen Jian-Sheng
Jauncey David
Morton Donald C.
Peterson Bruce
Wright Allen
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