Stellar Evolution and Late Type Stars

Details Stellar Evolution and Late Type Stars Stellar Evolution and Late Type Stars

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ap%26ss.230..169l&link_type=abstract

Astrophysics and Space Science, Volume 230, Issue 1-2, pp. 169-176

Astronomy and Astrophysics

Astrophysics

3

Late-Type Stars, Evolution, Carbon Stars, Rv Tauri Stars

Scientific paper

The M, S and C stars may be placed in an evolutionary sequence on the basis of direct observation of the spectroscopic transitions on the AGB of rich intermediate-age clusters in the Magellanic Clouds, but some S and C stars cannot be accounted for in this way. The S stars inω Centauri owe their peculiarity to a primordial enrichment in s-process elements. The J-type (13C-rich) carbon stars originate in a different way to the ordinary cool N-type carbon stars. Some of them have silicate-rich circumstellar dust, contrary to expectation. Some of the carbon-rich RV Tauri stars also have silicate-rich dust and in both cases it may be organised in a disc. Observational evidence for gas and dust ejection by ordinary N-type carbon stars has been found and may be inferred for some RV Tauri stars.

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