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Title: Amplitude Variability in gamma Dor and delta Sct Stars Observed by Kepler

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.
Authors:
 [1] ;  [1] ;  [1] ;  [2]
  1. Los Alamos National Laboratory
  2. New Mexico State University, Las Cruces, NM
Publication Date:
OSTI Identifier:
1211601
Report Number(s):
LA-UR-15-26498
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
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
Research Org:
Los Alamos National Laboratory (LANL)
Sponsoring Org:
NASA
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS