Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...210..489b&link_type=abstract
Astrophysical Journal, vol. 210, Dec. 1, 1976, pt. 1, p. 489-497.
Astronomy and Astrophysics
Astrophysics
5
Abundance, Giant Stars, Stellar Evolution, Stellar Mass, B Stars, Milky Way Galaxy, Morphology, Nuclear Fusion, Spectral Line Width, Stellar Spectra, Zirconium Isotopes
Scientific paper
It has been shown that the isotopes of carbon, nitrogen, and oxygen can provide valuable probes of the action of stellar synthesis in the Galaxy. In the present paper, an attempt is made to study the effects that the s-process synthesis from C, S, and Ba II stars (collectively called peculiar red giants) may have had on the general evolution of abundances in the Galaxy. The contribution of these stars to the pool of elements in the solar neighborhood is examined, placing emphasis on changes in the morphology of the s-process abundance curve and on differences of branching direction in the buildup paths of different s-processes. The study indicates that, if the fraction of a star's mass which is processed to new elements and ejected is approximately independent of the stellar mass, than the low-mass peculiar red giants can have contributed a moderate fraction of the total pool of s-process elements over the lifetime of the solar disk. Most peculiar red giants exhibit s-process abundance curves nonsolar in morphology.
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