Exploring the small-scale magnetic fields of the solar analog KIC 8006161 using asteroseismology
arXiv:2412.01258 · doi:10.3847/1538-4357/ad89a4
Abstract
The magnetic field is a significant and universal physical phenomenon in modern astrophysics. Small-scale magnetic fields are very important in the stellar atmosphere. They are ubiquitous, and strongly couple with the acoustic waves. Therefore, their presence affects the properties of acoustic waves in the stellar outer layer. In the present work, under the assumption that the small-scale magnetic features are the cause of the asteroseismic surface term (the frequency-dependent frequency offset between stars and their models), we explore the strength of such fields in the solar analog KIC 8006161. By considering the effect of small-scale magnetic fields in the stellar photosphere, we use the observed oscillation frequencies to constrain the inner structures and surface small-scale magnetic fields of solar-like star KIC 8006161. To agree with the existing observations, such as oscillation frequencies, and their frequency separation ratios, the theoretical model requires a small-scale magnetic field to form a magnetic-arch splicing layer in the stellar outer atmosphere. The small-scale magnetic field strengths for KIC 8006161 obtained from best-fit model with and as a free parameter, are approximately 96 G and 89 G, respectively. The corresponding locations of the magnetic-arch splicing layer are about km and 510 km, respectively.
References in corpus (28)
- Gaia Data Release 2. Summary of the contents and survey properties
- Modules for Experiments in Stellar Astrophysics (MESA)
- Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
- A Substantial Amount of Hidden Magnetic Energy in the Quiet Sun
- ADIPLS -- the Aarhus adiabatic oscillation package
- Numerical simulations of quiet Sun magnetism: On the contribution from a small-scale dynamo
- Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
- The Metallicities of Stars With and Without Transiting Planets
- Strong horizontal photospheric magnetic field in a surface dynamo simulation
- Amplitudes of Stellar Oscillations: The Implications for Asteroseismology
- Transverse component of the magnetic field in the solar photosphere observed by Sunrise
- Analysis of alpha Centauri AB including seismic constraints
- The horizontal internetwork magnetic field: numerical simulations in comparison to observations with Hinode
- 30 to 100-kG magnetic fields in the cores of red giant stars
- Helium abundance in a sample of cool stars: measurements from asteroseismology
- The influence of metallicity on stellar differential rotation and magnetic activity
- Characterizing solar-type stars from full-length Kepler data sets using the Asteroseismic Modeling Portal
- Three-dimensional simulations of near-surface convection in main-sequence stars - I. Overall structure
- Modelling Kepler Red Giants in Eclipsing Binaries:Calibrating the Mixing Length Parameter with Asteroseismology
- On the surface physics affecting solar oscillation frequencies
- Strong magnetic fields detected in the cores of 11 red giant stars using gravity-mode period spacings
- MESA meets MURaM: Surface effects in main-sequence solar-like oscillators computed using three-dimensional radiation hydrodynamics simulations
- Atomic diffusion in star models of type earlier than G
- A k-omega model for stellar turbulent convection
- Inference of magnetic fields in the very quiet Sun
- On the impact of the structural surface effect on global stellar properties and asteroseismic analyses
- New Insights for High-precision Asteroseismology: Acoustic Radius of KIC 6225718
- Estimating the nonstructural component of the helioseismic surface term using hydrodynamic simulations