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Expansion analyses on Planetary Nebulae
Published online by Cambridge University Press: 25 May 2016
Extract
Since planetary nebulae(PNe) are defined as the expanding ionized gas surrounding hot central stars, the most important and fundamental subject is to study expansion characteristics. What and how can we determine a typical expansion velocity of individual nebula? In spite of great success of Perek and Kohoutek Catalog(1967) and a recent Strasbourg-ESO Catalogued 992), PNe researchers have suffered from the lack of sufficiently large samples of expansion measurements on various type of PNe.
- Type
- IV. Envelopes
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- Copyright © Kluwer 1997