The robustness of asteroseismic estimates of global stellar parameters to surface term corrections

Abstract

Oscillation frequencies of even the best stellar models differ from those of the stars they represent, and the difference is predominantly a function of frequency. This difference is caused by limitations of modeling the near-surface layers of a star. This frequency-dependent frequency error, usually referred to as the "surface term" can result in erroneous interpretation of the oscillation frequencies unless treated properly. Several techniques have been developed to minimize the effect of the surface term; it is either subtracted out, or frequency combinations insensitive to the surface terms are used, or the asteroseismic phase $\epsilon$ is used to determine a match between models and stars. In this paper we show that no matter what technique is used to account for the surface term, as long as the physics of the models is the same, the global parameters of a star --- mass, radius and, age --- obtained from frequency analyses are robust. This implies that even though we cannot model the internal structure of stars perfectly, we can have confidence in all results that use stellar global properties obtained through the analysis of stellar oscillation frequencies.

arXiv commentAccepted for publication in ApJ

References in corpus (41)

• Low Temperature Opacities
• New solar opacities, abundances, helioseismology, and neutrino fluxes
• Element Diffusion in the Solar Interior
• Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology
• Asteroseismic fundamental properties of solar-type stars observed by the NASA Kepler Mission
• The APOKASC Catalog: An Asteroseismic and Spectroscopic Joint Survey of Targets in the Kepler Fields
• Correcting stellar oscillation frequencies for near-surface effects
• Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
• Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run
• Standing on the shoulders of Dwarfs: the $Kepler$ asteroseismic LEGACY sample I - oscillation mode parameters
• A new correction of stellar oscillation frequencies for near-surface effects
• YREC: The Yale Rotating Stellar Evolution Code
• Angular momentum transport by heat-driven g-modes in slowly pulsating B stars
• A uniform asteroseismic analysis of 22 solar-type stars observed by Kepler
• Properties of 42 Solar-type Kepler Targets from the Asteroseismic Modeling Portal
• Fresh insights on the structure of the solar core
• A precise asteroseismic age and radius for the evolved Sun-like star KIC 11026764
• An in-depth study of grid-based asteroseismic analysis
• Global Seismology of the Sun
• The First APOKASC Catalog of Kepler Dwarf and Subgiant Stars
• The Metallicities of Stars With and Without Transiting Planets
• Constraints on the structure of the core of subgiants via mixed modes: the case of HD49385
• Effects of errors in the solar radius on helioseismic inferences
• Precision study of ground state capture in the 14N(p,gamma)15O reaction
• Significantly improving stellar mass and radius estimates: A new reference function for the Δν scaling relation
• Constraining mixing processes in stellar cores using asteroseismology. Impact of semiconvection in low-mass stars
• Determining the initial helium abundance of the Sun
• Solar heavy element abundance: constraints from frequency separation ratios of low-degree p modes
• On the surface physics affecting solar oscillation frequencies
• Convection Theory and Sub-photospheric Stratification
• How accurate are stellar ages based on stellar models ? I. The impact of stellar models uncertainties
• Stellar models with calibrated convection and temperature stratification from 3D hydrodynamics simulations
• Model-independent measurement of internal stellar structure in 16 Cygni A and B
• Models of solar surface dynamics: impact on eigenfrequencies and radius
• Variation of Stellar Envelope Convection and Overshoot with Metallicity
• Surface effects on the red giant branch
• Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly I: A New Standard Solar Model
• Modeling the Asteroseismic Surface Term across the HR Diagram
• Surface layer independent model fitting by phase matching: theory and application to HD49933 an HD177153 (aka Perky)
• Parametrizing the time-variation of the "surface term" of stellar p-mode frequencies: application to helioseismic data
• On the computation of eigenfrequencies for equilibrium models including turbulent pressure

Cited by in corpus (14)

• Probing the interior physics of stars through asteroseismology
• Stellar ages, masses and radii from asteroseismic modeling are robust to systematic errors in spectroscopy
• Investigating surface correction relations for RGB stars
• Asteroseismic modelling of solar-type stars: A deeper look at the treatment of initial helium abundance
• On the impact of the structural surface effect on global stellar properties and asteroseismic analyses
• Differential Modelling Systematics across the HR Diagram from Asteroseismic Surface Corrections
• Mixed Modes and Asteroseismic Surface Effects: I. Analytic Treatment
• Mending the structural surface effect of 1D stellar structure models with non-solar metallicities based on interpolated 3D envelopes
• Impact of magnetic activity on inferred stellar properties of main sequence Sun-like stars
• Mixed Modes and Asteroseismic Surface Effects: II. Subgiant Systematics
• Revisiting the Red-giant Branch Hosts KOI-3886 and $\iota$ Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters
• Bayesian inference of stellar parameters based on 1D stellar models coupled with 3D envelopes
• A Higher Dimensional Cosmological Model for the Search of Dark Energy Source
• On the stellar core physics of the 16 Cyg binary system: constraining the central hydrogen abundance using asteroseismology