Keywords
ISM: Planetary Nebulae
Astrophysics
Astrophysics
How to Cite
Revised Diagnostic Diagrams for Planetary Nebulae. (2006). Revista Mexicana De Astronomía Y Astrofísica, 42(1), 47-51. https://astronomia.unam.mx/journals/rmxaa/article/view/2006rmxaa..42...47r
Abstract
Diagnostic diagrams of electron density-excitation for a sample of 613 planetary nebulae are presented. The present extensive sample allows the definition of new statistical limits for the distribution of planetary nebulae in the log [Halpha/[SII]] versus log[Halpha/[NII]], log [Halpha/[SII]] versus [SII] lambdalambda6717/6731, and log[Halpha/[NII]] versus [SII] lambdalambda6717/6731 planes. The diagrams provide a good representation of the ranges of physical conditions, indicated by these emission line ratios, present in planetary nebulae during different evolutionary stages.Similar Articles
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