On the period variations of short period pulsating variables.

Details On the period variations of short period pulsating variables. On the period variations of short period pulsating variables.

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pyuno....s.221j&link_type=abstract

Publications of the Yunnan Observatory, Suppl. 1999, p. 221 - 226

Physics

Pulsating Variables: Period Changes, Delta Scuti Stars: Period Changes

Scientific paper

From observation one finds the periods of pulsating variables are always changing along with time. Now one need to know what the reasons are and how they are caused. On the HR diagram, when a star evolves, its position will change following an evolving trap. That means its luminosity and surface temperature are changing continuously, then from the period-luminosity-color relation of the pulsating star, its periods must change continuously also. Could we find it or have we already found it from the real observation? From the 1980 till recent year, many authors had made discussions about the period variations of δ Scuti variables quite carefully but had not got a reasonable explanation. This paper discusses it again in some different point of view.

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