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- W2016459261 abstract "view Abstract Citations (369) References (110) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Chemical Composition of Red Giants. III. Further CNO Isotopic and s-Process Abundances in Thermally Pulsing Asymptotic Giant Branch Stars Smith, Verne V. ; Lambert, David L. Abstract Near-IR and IR spectra are analyzed to obtain elemental and isotopic C, N, and O abundance, iron peak abundances, and heavy element s-process abundances for a sample of M, MS, and S giants. The compositions of the M giants are similar to those of G and K giants and consistent with predictions for giants that have deep convective envelopes and so have experienced the first dredge-up. The MS and S giants have compositions that show the signatures of the third dredge-up that occurs in thermally pulsing AGB stars. The sample shows that C-12, a principal product of the He-burning shell, has been added to the envelopes of MS and S stars. The C-12 enrichment is correlated with a more marked enrichment of the s-process elements that are predicted to be synthesized when a neutron source is ignited in the He-burning shell. The MS and S giants show a higher N abundance than the M giants, attributed to the expected deep mixing that occurs with the onset of the episodic third dredge-up. Publication: The Astrophysical Journal Supplement Series Pub Date: February 1990 DOI: 10.1086/191421 Bibcode: 1990ApJS...72..387S Keywords: Asymptotic Giant Branch Stars; Infrared Spectra; Red Giant Stars; Stellar Composition; Stellar Oscillations; Stellar Spectra; Chemical Composition; Heavy Elements; Near Infrared Radiation; Astrophysics; INFRARED: SPECTRA; STARS: ABUNDANCES; STARS: BA II; STARS: LATE-TYPE full text sources ADS | data products SIMBAD (39) Related Materials (3) Part 1: 1985ApJ...294..326S Part 2: 1986ApJ...311..843S Part 4: 1995ApJ...450..302L" @default.
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- W2016459261 date "1990-02-01" @default.
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- W2016459261 title "The chemical composition of red giants. III - Further CNO isotopic and s-process abundances in thermally pulsing asymptotic giant branch stars" @default.
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