The nature of the L-alpha forest

Details The nature of the L-alpha forest The nature of the L-alpha forest

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65...12c&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, Jan.-Feb. 1988, p. 12-24. In Russian.

Astronomy and Astrophysics

Astronomy

1

Absorption Spectra, Lyman Alpha Radiation, Quasars, Spectral Line Width, Astronomical Models, Gas Density, Metallicity, Shock Waves

Scientific paper

Among the absorption lines of Lα forest in the spectrum of the QSO S5 0014+81, there is a unique phenomenon of 8 strong Lyman lines, five of which are observed as double ones with practically identical equivalent widths for each pair and with the same velocity splitting Δλ/λ for all the system. This phenomenon can be naturally explained within the framework of the model of the Lα forest as absorbing zones in the shells of metagalactic shock waves. Main features of the "twin" absorption systems in the spectrum of S5 0014+81 are explained. This specific geometry opens favourable opportunities for the search for weaker lines of metals, helium and deuterium; their detection in the QSO spectrum would be of great importance for both cosmology and cosmogony.

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