Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (179) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (12)
· Associated Articles
· Also-Read Articles (Reads History)
· Translate This Page
The chemical composition of red giants. II - Helium burning and the s-process in the MS and S stars
Smith, Verne V.; Lambert, David L.
AA(Texas, University; McDonald Observatory, Austin, TX), AB(Texas, University; McDonald Observatory, Austin, TX)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 311, Dec. 15, 1986, p. 843-863. Research supported by the Robert A. Welch Foundation. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Helium, M Stars, Nuclear Fusion, Red Giant Stars, S Stars, Stellar Composition, Atomic Spectra, Chemical Composition, Late Stars, Line Spectra, Stellar Evolution, Stellar Spectrophotometry
Bibliographic Code:


Carbon, nitrogen, oxygen, Fe-peak, and heavy s-process elemental abundances have been determined for an additional 12 stars of type M, MS, or S. When combined with results obtained previously for nine stars of type M or MS and the K5 giant alpha Tau, abundances are available for 22 cool red giants. Mg-isotopic ratios and technetium abundances are estimated for selected stars. Of the 22 stars studied, eight are of type MS and three of type S. Four of the MS stars show no measurable enhancements of the s-process elements. The seven stars which exhibit s-process enhancements also show increasing 12C abundances and the 12C abundances correlate with both absolute s-process enhancement and integrated neutron exposure. The results for the s-process and 12C-rich stars are compared to theoretical models of low-mass (1 - 2 M_sun;), thermally pulsing AGB stars.

Associated Articles

Part  1     Part  2     Part  3     Part  4    

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints