Asteroseismology with TESS: Emergence of Dipole Mode Suppression From Subgiants?
arXiv:2502.13950 · doi:10.3847/1538-4357/adae9e
Abstract
Dipole mode suppression is an observed behavior of solar-like oscillations in evolved stars. This study aims to search for depressed dipole modes in giant stars using data from the Transiting Exoplanet Survey Satellite (TESS) and investigate when the suppression starts to emerge. We study a sample of 8,651 TESS-evolved stars and find 179 stars with significant dipole mode depression by comparing the oscillation amplitudes of radial and dipole modes. Notably, 11 of them are located near the base of the red-giant branch, indicating that mode suppression appears earlier than the point inferred in previous studies with the Kepler data. These findings provide new evidence for the dipole mode suppression in giant stars, particularly in subgiants.
arXiv comment11 pages, 9 figures, and 2 Tables. The catalog is available online in the published version of APJ
References in corpus (24)
- emcee: The MCMC Hammer
- Understanding the Lomb-Scargle Periodogram
- Magnetic fields of non-degenerate stars
- Asteroseismic fundamental properties of solar-type stars observed by the NASA Kepler Mission
- Slowing the Spins of Stellar Cores
- The connection between stellar granulation and oscillation as seen by the Kepler mission
- How mergers magnetise massive stars
- Granulation in Red Giants: observations by the Kepler mission and 3D convection simulations
- Asteroseismology Can Reveal Strong Internal Magnetic Fields in Red Giant Stars
- Stellar evolution with rotation and magnetic fields:III: The interplay of circulation and dynamo
- A prevalence of dynamo-generated magnetic fields in the cores of intermediate-mass stars
- Super-Nyquist asteroseismology with the Kepler Space Telescope
- Period spacings in red giants I. Disentangling rotation and revealing core structure discontinuities
- Visibilities and bolometric corrections for stellar oscillation modes observed by Kepler
- Detection of Potential Transit Signals in 17 Quarters of Kepler Data: Results of the Final Kepler Mission Transiting Planet Search (DR25)
- Dipole modes with depressed amplitudes in red giants are mixed modes
- Magnetic Field Generation in Stars
- Modelling Kepler Red Giants in Eclipsing Binaries:Calibrating the Mixing Length Parameter with Asteroseismology
- Study of KIC 8561221 observed by Kepler: an early red giant showing depressed dipolar modes
- Suppression of quadrupole and octupole modes in red giants observed by Kepler
- Super-Nyquist asteroseismology of solar-like oscillators with Kepler and K2 - expanding the asteroseismic cohort at the base of the red-giant branch
- PBjam: A Python package for automating asteroseismology of solar-like oscillators
- A prescription for the asteroseismic surface correction
- Asteroseismology of 1523 misclassified red giants using data