Observations of the Lyman limit in 19 QSOs

Details Observations of the Lyman limit in 19 QSOs Observations of the Lyman limit in 19 QSOs

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195..437s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 195, May 1981, p. 437-449. Research supported by the Science Research C

Astronomy and Astrophysics

Astronomy

81

Astronomical Spectroscopy, Lyman Alpha Radiation, Nebulae, Quasars, Absorption Spectra, Astronomical Catalogs, Electromagnetic Absorption, Emission Spectra, Optical Thickness

Scientific paper

From direct spectroscopic observations of the Lyman-limit region in 32 QSOs, 19 of which are described here, it is found that the covering factor for large absorbing clouds in the emission region is likely to be less than or approximately equal to 0.15. Under these circumstances, it is unlikely that the mechanism for explaining the low Ly-alpha/H-beta emission-line intensity ratios in QSOs involves significant suppression of Ly-alpha.

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