Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.212..395d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 212, Jan. 15, 1985, p. 395-411.
Astronomy and Astrophysics
Astronomy
10
Cepheid Variables, Magellanic Clouds, Secular Variations, Stellar Evolution, Change Detection, Stellar Luminosity, Stellar Oscillations, Stellar Structure, Stochastic Processes
Scientific paper
The data for period change in some 115 Cepheid variable stars in the Magellanic Clouds are presented. The accuracy of each determination is estimated and for all but three of the stars it is possible to estimate whether the rate of change of period prior to 1966/67 is maintained subsequently. About 40 per cent of the stars show period variations, similar to the percentage estimated for galactic Cepheids by Hoffmeister (1967). About half of these variations cannot be regarded as being constant in rate. Probably the interpretation of the data lies either in small atmospheric changes that produce phase-discontinuities that accumulate or in small luminosity changes that produce random period changes.
Deasy H. P.
Wayman Patrick A.
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