Are the nebulae around R Coronae Borealis stars evolution or ejection related?

Details Are the nebulae around R Coronae Borealis stars evolution or ejection related? Are the nebulae around R Coronae Borealis stars evolution or ejection related?

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991msngr..66...50p&link_type=abstract

ESO Messenger (ISSN 0722-6691), no. 66, p. 50-52.

Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Nebulae, R Coronae Borealis Stars, Stellar Evolution, Stellar Mass Ejection, Cool Stars, Supergiant Stars

Scientific paper

Two scenarios are described which attempt to reconcile the observed
photospheric abundances with model predictions for the R Coronae
Borealis (R CrB) stars. These scenarios are: the last thermal pulse
scenario (Renzini, 1979, 1981 and Iben et al., 1983) and the merged
white dwarf scenario (Webbink, 1984).

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