The Fanaroff-Riley classification is a scheme created by B.L. Fanaroff and J.M. Riley in 1974, which is used to distinguish radio galaxies with active nuclei based on their radio luminosity or brightness of their radio emissions in relation to their hosting environment. Class I (abbreviated FR-I) are sources whose luminosity decreases as the distance from the central galaxy or quasar host increase, while Class II (FR-II) sources exhibit increasing luminosity in the lobes. These sources are called also edge-brightened. This distinction is important because it presents a direct link between the galaxy's luminosity and the way in which energy is transported from the central region and converted to radio emission in the outer parts.

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  • La classification Fanaroff-Riley est une classification servant à distinguer les radiogalaxies des galaxies actives selon leur luminosité dans les ondes radio selon leur environnement. Elle a été inventée en 1974 par Bernie Fanaroff (en) et Julia Riley (en). (fr)
  • The Fanaroff-Riley classification is a scheme created by B.L. Fanaroff and J.M. Riley in 1974, which is used to distinguish radio galaxies with active nuclei based on their radio luminosity or brightness of their radio emissions in relation to their hosting environment. Class I (abbreviated FR-I) are sources whose luminosity decreases as the distance from the central galaxy or quasar host increase, while Class II (FR-II) sources exhibit increasing luminosity in the lobes. These sources are called also edge-brightened. This distinction is important because it presents a direct link between the galaxy's luminosity and the way in which energy is transported from the central region and converted to radio emission in the outer parts. (en)
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http://purl.org/linguistics/gold/hypernym
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  • La classification Fanaroff-Riley est une classification servant à distinguer les radiogalaxies des galaxies actives selon leur luminosité dans les ondes radio selon leur environnement. Elle a été inventée en 1974 par Bernie Fanaroff (en) et Julia Riley (en). (fr)
  • The Fanaroff-Riley classification is a scheme created by B.L. Fanaroff and J.M. Riley in 1974, which is used to distinguish radio galaxies with active nuclei based on their radio luminosity or brightness of their radio emissions in relation to their hosting environment. Class I (abbreviated FR-I) are sources whose luminosity decreases as the distance from the central galaxy or quasar host increase, while Class II (FR-II) sources exhibit increasing luminosity in the lobes. These sources are called also edge-brightened. This distinction is important because it presents a direct link between the galaxy's luminosity and the way in which energy is transported from the central region and converted to radio emission in the outer parts. (en)
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  • Classification Fanaroff-Riley (fr)
  • Fanaroff-Riley classification (en)
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