Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..251..217g&link_type=abstract
Organic Matter in Space, Proceedings of the International Astronomical Union, IAU Symposium, Volume 251, p. 217-218
Astronomy and Astrophysics
Astronomy
Circumstellar Matter, Stars: Agb And Post-Agb, Planetary Nebulae
Scientific paper
We present the results of a systematic analysis of the solid state features identified in the circumstellar environments of a large sample of evolved stars with ISO/SWS and Spitzer/IRS spectroscopy. The sample includes several hundred stars with a wide variety of progenitor masses evolving from the early AGB phase to the PN stage. Our observations are used to propose an evolutionary scheme in which the results obtained can be interpreted as a consequence of the nucleosynthesis processes that take place in this short phase of the stellar evolution, in particular the third dredge-up and hot bottom burning, which in turn are also strongly modulated by the stellar metallicity.
Bobrowsky Matthew
Calderón V. Perea J.
Davies Joseph E.
Engels Dieter
Garcia-Hernandez Domingo Anibal
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