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Vertical abundances variation in the galaxy: The case of PN

Published online by Cambridge University Press:  25 May 2016

F. Cuisinier  and
J. Köppen
F. Cuisinier
Affiliation:
1IAG/USP, São Paulo, Brazil 2Obs. Strasbourg, France
J. Köppen
Affiliation:
2Obs. Strasbourg, France

Extract

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The vertical structure of the Galaxy is stratified in different populations. Gas and young stars have a low velocity dispersion (about 10 km/s) and thus are confined in a very thin disk (100 pc of scale height). Old stars have larger velocity dispersions, and are thus encountered up to a few kpc.

Type
VII. Planetary Nebulae in the Galactic Context
Information
Symposium - International Astronomical Union , Volume 180: Planetary Nebulae , 1997 , pp. 406
Copyright
Copyright © Kluwer 1997