Molecular abundances in AGB circumstellar envelopes

Details Molecular abundances in AGB circumstellar envelopes Molecular abundances in AGB circumstellar envelopes

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..223o&link_type=abstract

In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A

Physics

6

Asymptotic Giant Branch Stars, Circumstellar Envelopes, Isotope Ratios, Mass Loss, Molecular Abundances, Radiative Transfer

Scientific paper

In this review the present status of molecules in circumstellar envelopes of AGB stars is presented. Emphasis is put on the determination of abundances, and estimates of their uncertainties, from an observational point of view. Despite an impressive number of circumstellar species detected, about 60, there remains much work before general conclusions can be drawn. In particular, sophisticated radiative transfer modelling of circumstellar line emission must be done. This requires a detailed knowledge of the stellar and circumstellar properties, as well as basic molecular physics data. Eventually, the full potential of circumstellar spectra can be used in the study of the central stars and the circumstellar medium.

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