The Mysterious R Stars

Details The Mysterious R Stars The Mysterious R Stars

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1001...33i&link_type=abstract

IXTH TORINO WORKSHOP ON EVOLUTION AND NUCLEOSYNTHESIS IN AGB STARS AND THE IIND PERUGIA WORKSHOP ON NUCLEAR ASTROPHYSICS. AIP C

Astronomy and Astrophysics

Astrophysics

Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Origin, Formation, And Abundances Of The Elements, Giant And Subgiant Stars, Carbon Stars, S Stars, And Related Types, Abundances, Chemical Composition, Spectroscopic Binaries, Close Binaries

Scientific paper

The R stars are a rare class of K-type giant carbon stars. Canonical stellar evolutionary theory cannot explain their existence, yet they have been observed for more than a century. The early-R stars, the warmest in the R class, are enhanced in 12C, 13C and 14N relative to the Sun, but not in s-processes elements or oxygen, and are all single stars. We test the idea that binary mergers lead to the formation of the early-R stars by a comparison of binary population synthesis model results with observations.

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