The evolutionary considerations of R CR B stars - Observational approach

Details The evolutionary considerations of R CR B stars - Observational approach The evolutionary considerations of R CR B stars - Observational approach

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990basi...18..341r&link_type=abstract

Astronomical Society of India, Bulletin (ISSN 0304-9523), vol. 18, Sept.-Dec. 1990, p. 341-350.

Astronomy and Astrophysics

Astronomy

Abundance, B Stars, Stellar Evolution, Variable Stars, Helium, Magellanic Clouds, Planetary Nebulae, Stellar Envelopes, Stellar Oscillations, Stellar Spectra

Scientific paper

The properties of the hydrogen-deficient stars called extreme helium stars, R Cr B stars, and hydrogen-deficient carbon stars are briefly examined, emphasizing the R Cr B stars. Luminosities and temperatures, distribution and kinematics, abundances, pulsations, circumstellar environment, and structure and origin are addressed. The stage of stellar evolution at which a medium-mass star of normal composition could become hydrogen-deficient is considered.

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