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Echelle Studies on the Symmetrical Stratified Planetary Nebula NGC 3918

Published online by Cambridge University Press:  22 September 2016

M.A. Dopita*
Affiliation:
Mount Stromlo and Siding Spring Observatory, Australia

Extract

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Coudé échelle studies of the symmetrical planetary southern nebula NGC 3918 at a resolution of 20 km/sec have shown a high degree of stratification of velocity of expansion with ionisation. The greatest velocity of expansion, 28 km/sec is observed in the [Mgl] line at 4751 Å

Type
Session III: Physical Processes
Copyright
Copyright © Reidel 1978