Modern methods of spectral estimation based on parametric time-series models are useful tools in power spectral analysis. We apply the autoregressive (AR) model
In a previous paper, it was suggested that contamination of the nuclear lumiuosity by the host galaxy plays an important role in determining the parameters of t
Photometric results of three δ Scuti stars, AD Ari, IP Vir and YZ Boo from new observations obtained at the Xinglong Station of the Beijing Astronomical Observ