Emission of [O II] and [O III] Forbidden Transitions by Quasi-stellar Objects

Details Emission of [O II] and [O III] Forbidden Transitions by Quasi-stellar Objects Emission of [O II] and [O III] Forbidden Transitions by Quasi-stellar Objects

Dec 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967natur.216r1092b&link_type=abstract

Nature, Volume 216, Issue 5120, pp. 1092-1094 (1967).

Physics

7

Scientific paper

THE observation of forbidden transitions in the emission spectra of quasi-stellar objects1,2 has led previous authors to deduce limiting values for the electron density in relevant regions of these sources (for example, ref. 1). In this report I shall show that significant limits must be set on the ultraviolet radiation intensity in the emitting region, and thus on the size of the region, if the observations of certain [O II] transitions are to be explained even at low electron densities.

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