On the impact of the structural surface effect on global stellar properties and asteroseismic analyses

Abstract

In a series of papers, we have recently demonstrated that it is possible to construct stellar structure models that robustly mimic the stratification of multi-dimensional radiative magneto-hydrodynamic simulations at every time-step of the computed evolution. The resulting models offer a more realistic depiction of the near-surface layers of stars with convective envelopes than parameterizations, such as mixing length theory, do. In this paper, we explore how this model improvement impacts on seismic and non-seismic properties of stellar models across the Hertzsprung-Russell diagram. We show that the improved description of the outer boundary layers alters the predicted global stellar properties at different evolutionary stages. In a hare and hound exercise, we show that this plays a key role for asteroseismic analyses, as it, for instance, often shifts the inferred stellar age estimates by more than 10 per cent. Improper boundary conditions may thus introduce systematic errors that exceed the required accuracy of the PLATO space mission. Moreover, we discuss different approximations for how to compute stellar oscillation frequencies. We demonstrate that the so-called gas ${\Gamma }_1$ approximation performs reasonably well for all main-sequence stars. Using a Monte Carlo approach, we show that the model frequencies of our hybrid solar models are consistent with observations within the uncertainties of the global solar parameters when using the so-called reduced ${\Gamma }_1$ approximation.

arXiv commentSubmitted to MNRAS

References in corpus (80)

• emcee: The MCMC Hammer
• Planck 2015 results. XIII. Cosmological parameters
• The chemical composition of the Sun
• Helioseismology and Solar Abundances
• Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology
• Simulations of stellar convection with CO5BOLD
• Testing Scaling Relations for Solar-Like Oscillations from the Main Sequence to Red Giants using Kepler Data
• ADIPLS -- the Aarhus adiabatic oscillation package
• A new Generation of Standard Solar Models
• New Solar Composition: The Problem With Solar Models Revisited
• Correcting stellar oscillation frequencies for near-surface effects
• Probing the interior physics of stars through asteroseismology
• Stellar Turbulent Convection: A Selfconsistent Model
• 10,000 Standard Solar Models: a Monte Carlo Simulation
• 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
• CLES, Code Liegeois d'Evolution Stellaire
• Characterization of the power excess of solar-like oscillations in red giants with Kepler
• A new correction of stellar oscillation frequencies for near-surface effects
• Testing the asteroseismic scaling relations for Red Giants with Eclipsing Binaries Observed by Kepler
• Improvements to stellar structure models, based on a grid of 3D convection simulations. II. Calibrating the mixing-length formulation
• 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
• Interferometric radii of bright Kepler stars with the CHARA Array: θ Cygni and 16 Cygni A and B
• Stellar ages and convective cores in field main-sequence stars: first asteroseismic application to two Kepler targets
• Accurate Determination of the Solar Photospheric Radius
• The Correlation Between Mixing Length and Metallicity on the Giant Branch: Implications for Ages in the Gaia Era
• Bayesian peak-bagging of solar-like oscillators using MCMC: A comprehensive guide
• Determining stellar parameters of asteroseismic targets: going beyond the use of scaling relations
• On the opacity change required to compensate for the revised solar composition
• NGC 6819: testing the asteroseismic mass scale, mass loss, and evidence for products of non-standard evolution
• PLATO as it is: a legacy mission for Galactic archaeology
• AIMS - A new tool for stellar parameter determinations using asteroseismic constraints
• Surface-effect corrections for solar-like oscillations using 3D hydrodynamical simulations
• Definitive Sun-as-a-star p-mode frequencies: 23 years of BiSON observations
• Fundamental Parameters of Main-Sequence Stars in an Instant with Machine Learning
• The Mass Mixing Length in Convective Stellar Envelopes
• Helioseismology and standard solar models
• Determining the initial helium abundance of the Sun
• On the surface physics affecting solar oscillation frequencies
• Lithium depletion in solar-like stars: effect of overshooting based on realistic multi-dimensional simulations
• A Bayesian approach to the modelling of alpha Cen A
• 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
• Using the Standard Solar Model to Constrain Composition and S-Factors
• Parallax and masses of alpha Centauri revisited
• On the red-giant luminosity bump
• Stellar models with mixing length and T(tau) relations calibrated on 3D convection simulations
• Effective temperatures of red giants in the APOKASC catalogue and the mixing length calibration in stellar models
• Asteroseismology and Exoplanets: Proceedings of the IVth Azores International Advanced School in Space Sciences
• Stellar models with calibrated convection and temperature stratification from 3D hydrodynamics simulations
• Asteroseismic constraints on the cosmic-time variation of the gravitational constant from an ancient main-sequence star
• 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 II: Stellar Evolution and Asteroseismic Applications
• Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly I: A New Standard Solar Model
• Inferring high redshift large-scale structure dynamics from the Lyman-alpha forest
• Asteroseismic radii of dwarfs: New accuracy constraints from Gaia DR2 parallaxes
• Convective boundary mixing in low- and intermediate-mass stars I. Core properties from pressure-mode asteroseismology
• On The Statistical Properties of the Lower Main Sequence
• Investigating surface correction relations for RGB stars
• Calibration of the mixing-length parameter $\alpha$ for the MLT and FST models by matching with CO${}^5$BOLD models
• Surface-effect corrections for the solar model
• On the hydrostatic stratification of the solar tachocline
• Theoretical oscillation frequencies for solar-type dwarfs from stellar models with $⟨3\mathrm{D}⟩$-atmospheres
• Explicit Bayesian treatment of unknown foreground contaminations in galaxy surveys
• The robustness of asteroseismic estimates of global stellar parameters to surface term corrections
• Overcoming the structural surface effect with a realistic treatment of turbulent convection in 1D stellar models
• Influence of metallicity on the near-surface effect on oscillation frequencies
• Mending the structural surface effect of 1D stellar structure models with non-solar metallicities based on interpolated 3D envelopes
• Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time
• Damping rates and frequency corrections of Kepler LEGACY stars
• Effects of convection on the mean solar structure
• Helium-Abundance and Other Composition Effects on the Properties of Stellar Surface Convection in Solar-like Main-sequence Stars
• Bayesian inference of stellar parameters based on 1D stellar models coupled with 3D envelopes
• Asteroseismic Stellar Modelling with AIMS
• Solar model with CNO revised abundances
• Improving 1D Stellar Models with 3D Atmospheres
• An updated discussion of the solar abundance problem
• Constraints on stellar interior physics from helioseismology

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• The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18
• Imprint of the magnetic activity cycle on solar asteroseismic characterisation based on 26 years of GOLF and BiSON data
• Asteroseismic modelling strategies in the PLATO era I. Mean density inversions and direct treatment of the seismic information
• Surface effects and turbulent pressure. Assessing the Gas-${\Gamma }_1$ and Reduced-${\Gamma }_1$ empirical models
• Influence of the magnetic activity cycle on mean density and acoustic radius inversions
• Asteroseismogyrometry of low-mass red giants I. The SOLA inversion method
• Frequency separation ratios do not suppress magnetic activity effects in solar-like stars
• Exploring the small-scale magnetic fields of the solar analog KIC 8006161 using asteroseismology
• Asteroseismic modelling of main-sequence solar-like stars and Kepler exoplanet host stars with the FICO procedure I. Catalogue of fundamental stellar properties
• Glitch analysis and asteroseismic modelling of subgiant $\mu$ Herculis: confirming and interpreting the ${\Gamma }_1$ peak as the helium glitch
• Advanced asteroseismic modelling: breaking the degeneracy between stellar mass and initial helium abundance
• Asteroseismic Analysis of a Red Giant KIC 9145955 by Including the Small-scale Magnetic Fields in the Atmosphere
• PLATO Hare-and-Hounds exercise: Asteroseismic model fitting of main-sequence solar-like pulsators