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astro-ph1999
Survey of Large Planetary Nebulae in Decay
Thomas Rauch, Elise Furlan, Florian Kerber +1
The Planetary Nebulae (PNe) return nuclear processed stellar material back to the interstellar medium (ISM) and thus have an important influence on the chemical evolution of our Ga…
astro-ph1999
Optical properties of carbon grains: Influence on dynamical models of AGB stars
Anja C. Andersen, Rita Loidl, Susanne Hofner
For amorphous carbon several laboratory extinction data are available, which show quite a wide range of differences due to the structural complexity of this material. We have calcu…