Secular Evolution in Z Tauri

Volume 34 number 1 (2006)

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Aaron Price
AAVSO,
Geir Klingenberg
Norwegian

Abstract

Z Tauri is a Mira variable with observations in the AAVSO International Database dating back 85 years. Wavelet analysis of the observations reveals a period decline of around 13% from 500 days to 442 days per cycle. In addition, flat minima suggest the possible presence of an undetected companion.