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Infrared and radio recombination line observations of DR 21

Pieter R. Roelfsema, W. M. Goss, Tr Geballe

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Abstract

Les observations VLA des raies de recombinaison radio (H 76α, He 110 α et H 110α) et IR (hydrogene Brα) de la region H II galactique DR 21 sont presentees. Les parametres des raies sont determines. Les proprietes de l'hydrogene et de l'helium ionises sont analysees

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Key concepts: Physics, Astrophysics, Helium, Line (geometry), Astronomy, Atomic physics, Mathematics, Geometry