Amplitude Variability in gamma Dor and delta Sct Stars Observed by Kepler
- Los Alamos National Laboratory
- New Mexico State University, Las Cruces, NM
The NASA Kepler spacecraft data revealed a large number of new multimode nonradially pulsating gamma Dor and delta Sct variable stars. The Kepler high-precision long time-series photometry makes it possible to study amplitude variations of the frequencies, and recent literature on amplitude and frequency variations in nonradially pulsating variables is summarized. Several methods are applied to study amplitude variability in about a dozen gamma Doradus or delta Scuti candidate variable stars observed for several quarters as part of the Kepler Guest Observer program. The magnitude and timescale of the amplitude variations are discussed, along with the presence or absence of correlations between amplitude variations for different frequencies of a given star. Proposed causes of amplitude spectrum variability that will require further investigation are also discussed.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Aeronautics and Space Administration (NASA)
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1211601
- Report Number(s):
- LA-UR-15-26498
- Resource Relation:
- Conference: International Astronomical Union Focus Meeting 17: Advances in Stellar Physics from Asteroseismology ; 2015-08-12 - 2015-08-12 ; Honolulu, Hawaii, United States
- Country of Publication:
- United States
- Language:
- English
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