Analysis of Long-Term Single-Site Observations of The Pulsating DB White Dwarf GD 358

Abstract

Abstract. We briefly describe the analysis of single-site data collected from 1982 to 1992 for the pulsating DB white dwarf GD 358. We show that the amplitudes of almost all of the £ = 1 modes change over time, and some of the £ = 1 modes disappear for months at a time. We also find a new mode at k -19, with a frequency of <~1173/zHz.