Implications of Lyman continuum observations of quasars

Details Implications of Lyman continuum observations of quasars Implications of Lyman continuum observations of quasars

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235.1121c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Dec. 15, 1988, p. 1121-1128.

Astronomy and Astrophysics

Astronomy

7

Active Galactic Nuclei, Lyman Spectra, Quasars, Absorption Spectra, Continuous Spectra, Emission Spectra, Lyman Alpha Radiation, Spectral Line Width

Scientific paper

Using current estimates of the sizes of the continuum source and the emission line clouds, and the gas covering factor, it is shown that the expected depression at the Lyman continuum is about half that expected from simple arguments concerning the covering factor. Observations of an object chosen to be fairly free of intervening Ly-alpha absorption, and expected to have a relatively large covering factor from theoretical arguments, are compatible with covering factors between 0 and 25 percent. Present Lyman-limit observations provide no meaningful limit to the covering factor, but they severely constrain thermal models for the uv bump.

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