The covering factor of quasar broad absorption line clouds

Details The covering factor of quasar broad absorption line clouds The covering factor of quasar broad absorption line clouds

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330l..83m&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 330, July 15, 1988, p. L83-L86.

Mathematics

Probability

15

Absorption Spectra, Line Spectra, Nitrogen, Quasars, Cloud Cover, Emission Spectra, Probability Density Functions, Radiative Transfer

Scientific paper

Two different interpretations of the phenomenon of broad absorption line (BAL) QSOs are presented and a resolution is suggested. One interpretation is that the BAL clouds cover most of the sky as viewed from the quasar; this implies that BALQSOs are an usual subset of the general class of QSOs. The other interpretation suggests that the BAL clouds cover about 10 percent of the sky as viewed from the quasar; thus, most, if not all, quasars have BAL clouds. It is argued that neither extreme is correct, and that quasars have a range of BAL covering factors. An analysis is presented of emission-line strengths in BALQSOs relative to those of non-BALQSOs.

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