The Emission-Line Properties of Low-Redshift Quasi-stellar Objects
作者： Todd A. Boroson , Richard F. Green
DOI: 10.1086/191661
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摘要: Spectra covering the region λλ4300-5700 have been obtained of all 87 QSOs in BQS catalog having redshifts less than 0.5. An empirical technique which allows measurement and subtraction many Fe II lines this has developed applied to these spectra. Measurements strengths Hβ, [O III] λ5007, He λ4686, a four-dimensional parameterization Hβ profile combined with optical, radio, X-ray continuum information from literature try understand how properties are related
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