Time-dependent Behaviour of the Low Amplitude δ Scuti Star HD 52788

Wavelet transform is applied to reanalyze the low amplitude δ Scuti star HD 52788,which exhibits complex light variations with uncertain frequency solutions.We gain an insight into the strong instability of pulsation present in the star.Based on an estimate of the star's physical parameters,its evolutionary status is determined.An attempt of asteroseismic modelling failed to predict the observed dense frequencies.Because of its varying pulsation spectrum,HD 52788is a distinctive and very interesting object among δ Sct stars for testing current models of stellar evolution and pulsation.

作 者： Ai-Ying Zhou   作者單位： National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012  刊 名： 天體物理學(xué)報(bào)(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS  年，卷(期)： 2004 4(4)  分類號(hào)：   關(guān)鍵詞： methods:data analysis-stars:oscillations-δ Scuti-stars:individual (HD 52788)  

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