Absorption from clouds in QSO emission-line regions

Details Absorption from clouds in QSO emission-line regions Absorption from clouds in QSO emission-line regions

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191...55c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 191, Apr. 1980, p. 55-60. Research supported by the Science Research Co

Other

27

Cosmic Gases, Emission Spectra, Interstellar Extinction, Quasars, Stellar Spectra, Ultraviolet Absorption, Absorption Spectra, Carbon, Far Ultraviolet Radiation, Photoionization

Scientific paper

The absorption properties of the constituent clouds of QSO emission-line regions are discussed. An ensemble of large (relative to the continuum source) radiation bounded clouds can already be ruled out. Model calculations show that in this case there should be complete absorption at the C I edge (1100 A), and this has not been found in any QSO spectrum. Another possibility is that the clouds are small compared with the continuum source, and many lie along a line of sight. Spectrum synthesis shows that, if the covering factor is small, their absorption has little visible effect on the QSO spectrum.

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