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astro-ph2005
The very young planetary nebula LS IV -12 111
L. Cerrigone, G. Umana, C. Trigilio
In the last few years we have started a systematic study aimed at detecting very young Planetary Nebulae (YPNs). The project, based on both radio (multi-frequency and high resoluti…
astro-ph2003
A new sample of young Planetary Nebulae
G. Umana, L. Cerrigone, C. Trigilio +1
Despite of numerous efforts, the stage from Asymptotic Giant Branch (AGB) to Planetary Nebulae (PN) is a poorly understood phase of stellar evolution. We have therefore carried out…