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OBSERVATIONAL STUDY OF THE SPIRAL GALAXY NGC-6946 .2. H-I KINEMATICS AND MASS-DISTRIBUTION

Claude Carignan, Patrick Charbonneau, F. Boulanger, F. Viallefond

Abstract

Les observations radio, dans la raie 21 cm, de la galaxie spirale NGC 6946 sont presentees. Le champ de vitesse et la courbe de rotation du gaz H I et la distribution de masse de la galaxie sont analyses. NGC 6946 est determinee comme du type conspiration disque-halo (van Albada T. S. et Sancisi R., 1986, Phil. Trans. R. Soc. Lon., 320).

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Key concepts: Physics, Astrophysics, Spiral galaxy, Mass distribution, Galaxy rotation curve, Halo, Galaxy, Astronomy