On the period of the pulsating R Coronae Borealis variable, RY SGR

Details On the period of the pulsating R Coronae Borealis variable, RY SGR On the period of the pulsating R Coronae Borealis variable, RY SGR

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200.1019k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 200, Sept. 1982, p. 1019-1024.

Astronomy and Astrophysics

Astronomy

53

Carbon Stars, Periodic Variations, R Coronae Borealis Stars, Supergiant Stars, Variable Stars, Ephemerides, Hydrogen, Minima, Stellar Evolution, Stellar Models, Stellar Oscillations

Scientific paper

An analysis of observations of RY Sgr made between 1926 and 1978 shows the pulsation period to have decreased steadily during that time. The occurrence of pulsational minima can be well represented by a period which decreases at a rate of 0.0005 day/cycle, a value in good agreement with theoretical models for the evolution of a hydrogen-deficient carbon star.

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