Mending the structural surface effect of 1D stellar structure models with non-solar metallicities based on interpolated 3D envelopes

Abstract

1D stellar evolution codes employ rudimentary treatments of turbulent convection. For stars with convective envelopes, this leads to systematic errors in the predicted oscillation frequencies needed for asteroseismology. One way of mending these structural inadequacies is through patching, whereby the outermost layers of 1D models are replaced by the mean stratifications from 3D simulations. In order to viably implement this approach in asteroseismic analysis, interpolation throughout precomputed 3D envelopes is required. We present a method that interpolates throughout precomputed 3D envelopes as a function of effective temperature, surface gravity, and metallicity. We conduct a series of validation tests that demonstrate that the scheme reliably and accurately reproduces the structures of stellar envelopes and apply our method to the Sun as well as two stars observed by Kepler. We parameterize the frequency shift that results from patching and show that the functional forms are evolutionary dependent. In addition we find that neglecting modal effects, such as non-adiabatic energetics, introduces systematic errors in asteroseimically obtained stellar parameters. Both these results suggest that a cautious approach is necessary when utilizing empirical surface corrections in lieu of patching models. Our results have important implications, particularly for characterizing exoplanet systems, where accuracy is of utmost concern.

17 pages, 14 figures

References in corpus (38)

• The chemical composition of the Sun
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• Low Temperature Opacities
• Big Bang Nucleosynthesis: 2015
• Helioseismology
• Asteroseismology of Solar-Type and Red-Giant Stars
• Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology
• ADIPLS -- the Aarhus adiabatic oscillation package
• Correcting stellar oscillation frequencies for near-surface effects
• Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
• The Stagger-grid: A Grid of 3D Stellar Atmosphere Models - I. Methods and General Properties
• Standing on the shoulders of Dwarfs: the $Kepler$ asteroseismic LEGACY sample I - oscillation mode parameters
• Exploring Exoplanet Populations with NASA's Kepler Mission
• A new correction of stellar oscillation frequencies for near-surface effects
• Improvements to stellar structure models, based on a grid of 3D convection simulations. II. Calibrating the mixing-length formulation
• Asteroseismology for "à la carte" stellar age-dating and weighing: Age and mass of the CoRoT exoplanet host HD 52265
• The initial Helium content of Galactic Globular Cluster stars from the R-parameter: comparison with the CMB constraint
• A Grid of 3D Stellar Atmosphere Models of Solar Metallicity: I. General Properties, Granulation and Atmospheric Expansion
• The Stagger-grid: A grid of 3D stellar atmosphere models - III. The relation to mixing-length convection theory
• Oscillation frequencies for 35 \Kepler solar-type planet-hosting stars using Bayesian techniques and machine learning
• The Correlation Between Mixing Length and Metallicity on the Giant Branch: Implications for Ages in the Gaia Era
• Surface-effect corrections for solar-like oscillations using 3D hydrodynamical simulations
• Definitive Sun-as-a-star p-mode frequencies: 23 years of BiSON observations
• Constraining mixing processes in stellar cores using asteroseismology. Impact of semiconvection in low-mass stars
• On the surface physics affecting solar oscillation frequencies
• The Stagger-grid: A Grid of 3D Stellar Atmosphere Models - II. Horizontal and Temporal Averaging and Spectral Line Formation
• MESA meets MURaM: Surface effects in main-sequence solar-like oscillators computed using three-dimensional radiation hydrodynamics simulations
• Asteroseismic modelling of solar-type stars: internal systematics from input physics and surface correction methods
• Surface-effect corrections for oscillation frequencies of evolved stars
• BiSON data preparation: A correction for differential extinction and the weighted averaging of contemporaneous data
• Stellar models with calibrated convection and temperature stratification from 3D hydrodynamics simulations
• The asteroseismic surface effect from a grid of 3D convection simulations. I. Frequency shifts from convective expansion of stellar atmospheres
• Models of solar surface dynamics: impact on eigenfrequencies and radius
• Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly I: A New Standard Solar Model
• Surface-effect corrections for the solar model
• Theoretical oscillation frequencies for solar-type dwarfs from stellar models with $⟨3\mathrm{D}⟩$-atmospheres
• The robustness of asteroseismic estimates of global stellar parameters to surface term corrections
• Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time

Cited by in corpus (13)

• Probing the interior physics of stars through asteroseismology
• A prescription for the asteroseismic surface correction
• Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly II: Stellar Evolution and Asteroseismic Applications
• Convective boundary mixing in low- and intermediate-mass stars I. Core properties from pressure-mode asteroseismology
• Investigating surface correction relations for RGB stars
• On the impact of the structural surface effect on global stellar properties and asteroseismic analyses
• Overcoming the structural surface effect with a realistic treatment of turbulent convection in 1D stellar models
• The effect of the adiabatic assumption on asteroseismic scaling relations for luminous red giants
• Asteroseismic modelling strategies in the PLATO era I. Mean density inversions and direct treatment of the seismic information
• Bayesian inference of stellar parameters based on 1D stellar models coupled with 3D envelopes
• Surface effects and turbulent pressure. Assessing the Gas-${\Gamma }_1$ and Reduced-${\Gamma }_1$ empirical models
• On the nature of the core of $\alpha$ Centauri A: the impact of the metallicity mixture
• Weighing stars from birth to death: mass determination methods across the HRD