Low-excitation Atomic Gas Around Evolved Stars: ISO Observations of C-rich Nebulae

Details Low-excitation Atomic Gas Around Evolved Stars: ISO Observations of C-rich Nebulae Low-excitation Atomic Gas Around Evolved Stars: ISO Observations of C-rich Nebulae

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001assl..265..403f&link_type=abstract

Post-AGB Objects as a Phase of Stellar Evolution, Proceedings of the Toruń Workshop held July 5-7, 2000. Edited by R. Szczerba a

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present ISO LWS and SWS observations of far-infrared atomic fine structure lines in 12 carbon-rich evolved stars from the AGB phase to the formation of the PN. Our analysis shows that photodissociation and not shocks dominates the evolution of the circumstellar envelope by transforming the initially molecular AGB envelopes into the atomic gas found in PPNe and PNe. Atomic mass estimates are also derived.

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