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A tentative classification of galaxies with active nuclei
Proposes a bidimensional classification for galaxies with active nuclei (N galaxies, Seyfert galaxies, quasars and BL Lac objects) based on morphological and spectroscopic criteria. It is suggested that a quasar or an N galaxy should be called a Seyfert 1 if their spectrum shows broad Balmer lines;...
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| Lenguaje: | eng |
| Publicado: |
1979
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| Acceso en línea: | http://cds.cern.ch/record/880093 |