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Period Variation of BW VUL
1993
International Astronomical Union Colloquium
Due to the large fluctuation of the time of light maxima, in each observational season only very few observations is very dangerous for period variation research. Especially when the observation is not accurate enough such as for the early radial velocity data. Of course parts of the fluctuation are real which are caused by the chaotic behavior of the complicated pulsation. Generally the pulsation is quite periodic but is not like a timer such as the oscillation of the quartz or the rotating of
doi:10.1017/s0252921100014226
fatcat:6xbnqlsbenfkfon67ezqlngi64