Multiperiodicity in Five Small-Amplitude Pulsating Red Giants
Abstract
We report multiperiodicity in five small-amplitude pulsating red giants: RZ Ari, V523 Mon, BC CMi, UX Lyn, and FS Com. For each of these stars, two or three periods recur in each season of our 5000 day database of V observations. The periods and their ratios are consistent with low-order radial pulsation modes. The amplitudes of the modes change significantly on timescales of 1-5 yr; specifically, the amplitudes of the dominant periods vary on timescales of 2000-3500 days. Most often, the amplitudes of the modes in a given star rise and fall in unison.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- April 2003
- DOI:
- 10.1086/374199
- Bibcode:
- 2003PASP..115..479P
- Keywords:
-
- Stars: AGB and Post-AGB;
- Stars: Late-Type;
- Stars: Variables: Other