Bibcode
Barceló Forteza, S.; Michel, E.; Roca Cortés, T.; García, R. A.
Bibliographical reference
Astronomy and Astrophysics, Volume 579, id.A133, 8 pp.
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7
2015
Journal
Citations
28
Refereed citations
25
Description
A study of the star KIC 5892969 observed by the Kepler satellite is
presented. Its three highest amplitude modes present a strong amplitude
modulation. The aim of this work is to investigate amplitude variations
in this star and their possible cause. Using the 4 years-long
observations available, we obtained the frequency content of the full
light curve. Then, we studied the amplitude and phase variations with
time using shorter time stamps. The results obtained are compared with
the predicted ones for resonant mode coupling of an unstable mode with
lower frequency stable modes. Our conclusion is that resonant mode
coupling is consistent as an amplitude limitation mechanism in several
modes of KIC 5892969 and we discuss to which extent it might play an
important role for other δ Scuti stars.
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Helio and Astero-Seismology and Exoplanets Search
The principal objectives of this project are: 1) to study the structure and dynamics of the solar interior, 2) to extend this study to other stars, 3) to search for extrasolar planets using photometric methods (primarily by transits of their host stars) and their characterization (using radial velocity information) and 4) the study of the planetary
Savita
Mathur