DOI: https://doi.org/10.18524/1810-4215.1996.9.109652

ON EVOLUTIONARY STATUS OF STARS WITH THE R CrB PHENOMENON

A. E. Rosenbush

Анотація


Two key features are important for understanding the evolution of stars with the R Coronae Borealis variability: the state of high mass loss rate and the carbon overabundance. The hydrogen deficiency is a consequence of these two characteristics. This idea allows us to build one of several possible evolutionary chains from observable states of some stars: from a low mass star of the FG Sge type with a thin hydrogen shell through the phases of V854 Cen - R CrB - UV Gas to a star of the XX Cam type with hydrogen completely lost.

 


Ключові слова


R CrB stars; hydrogen-deficient stars; stellar evolution

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