Evidence of amplitude modulation due to resonant mode coupling in the δ Scuti star KIC 5892969. A particular or a general case?

Bibcode
2015A&A...579A.133B
DOI
10.1051/0004-6361/201425507
Barceló Forteza, S.; Michel, E.; Roca Cortés, T.; García, R. A.
Bibliographical reference

Astronomy and Astrophysics, Volume 579, id.A133, 8 pp.

Advertised on:
7
2015
Journal
Astronomy and Astrophysics
Number of authors
4
IAC number of authors
2
Citations
33
Refereed citations
29
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.
Related projects
Helio and Asteroseismology
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
In progress
Type
Refereed
Stellar & Interstellar Physics (FEEI)
Asteroseismology

It may interest you

  • Refereed
    Planetary nebula evolution for single stellar models. The formation of neutral spikes
    Two-dimensional hydrodynamical simulations are presented from the formation up to the late evolution of planetary nebula, for six different stellar models from 1 to 5 M $_{\odot }$. The hydrodynamical models use stellar evolution calculations as inner boundary conditions and updated values for the number of ionizing photons. Special emphasis is
    García-Segura, Guillermo et al.

    Advertised on:

    11
    2025
    Bibcode
    2025MNRAS.543.3867G
    Citations
    0
  • Refereed
    SN 2024bfu, SN 2025qe, and the early light curves of type Iax supernovae
    Type Iax supernovae (SNe Iax) are one of the most common subclasses of thermonuclear supernova and yet their sample size, particularly those observed shortly after explosion, remains relatively small. In this paper, we present photometric and spectroscopic observations of two SNe Iax discovered shortly after explosion, SN 2024bfu and SN 2025qe
    Magee, M. R. et al.

    Advertised on:

    11
    2025
    Bibcode
    2025MNRAS.543.3731M
    Citations
    0
  • Refereed
    Aligned, Multiple-transient Events in the First Palomar Sky Survey
    Old, digitized astronomical images taken before the human spacefaring age offer a rare glimpse of the sky before the era of artificial satellites. In this paper, we present the first optical searches for artificial objects with high specular reflections near the Earth. We follow the method proposed in Villarroel et al. and use a transient sample
    Villarroel, Beatriz et al.

    Advertised on:

    10
    2025
    Bibcode
    2025PASP..137j4504V
    Citations
    0