Seismic measurement of the locations of the base of convection zone and helium ionization zone for stars in the {\it Kepler} seismic LEGACY sample
arXiv:1701.08987 · doi:10.3847/1538-4357/aa5da7
Abstract
Acoustic glitches are regions inside a star where the sound speed or its derivatives change abruptly. These leave a small characteristic oscillatory signature in the stellar oscillation frequencies. With the precision achieved by {\it Kepler} seismic data, it is now possible to extract these small amplitude oscillatory signatures, and infer the locations of the glitches. We perform glitch analysis for all the 66 stars in the {\it Kepler} seismic LEGACY sample to derive the locations of the base of the envelope convection zone and the helium ionization zone. The signature from helium ionization zone is found to be robust for all stars in the sample, whereas the convection zone signature is found to be weak and problematic, particularly for relatively massive stars with large errorbars on the oscillation frequencies. We demonstrate that the helium glitch signature can be used to constrain the properties of the helium ionization layers and the helium abundance.
arXiv comment16 pages, 12 figures, 2 tables, Accepted for publication in ApJ
References in corpus (51)
- Planck 2015 results. XIII. Cosmological parameters
- The chemical composition of the Sun
- Modules for Experiments in Stellar Astrophysics (MESA)
- Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
- Low Temperature Opacities
- Kepler Mission Design, Realized Photometric Performance, and Early Science
- Solar Fusion Cross Sections
- Element Diffusion in the Solar Interior
- Helioseismology and Solar Abundances
- Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology
- ADIPLS -- the Aarhus adiabatic oscillation package
- Up-dated opacities from the Opacity Project
- Asteroseismic fundamental properties of solar-type stars observed by the NASA Kepler Mission
- Correcting stellar oscillation frequencies for near-surface effects
- Ensemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission
- Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
- Standing on the shoulders of Dwarfs: the asteroseismic LEGACY sample I - oscillation mode parameters
- S-factor of 14N(p,gamma)15O at astrophysical energies
- A new correction of stellar oscillation frequencies for near-surface effects
- YREC: The Yale Rotating Stellar Evolution Code
- Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars
- A uniform asteroseismic analysis of 22 solar-type stars observed by Kepler
- Asteroseismology for "à la carte" stellar age-dating and weighing: Age and mass of the CoRoT exoplanet host HD 52265
- Properties of 42 Solar-type Kepler Targets from the Asteroseismic Modeling Portal
- Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA
- An in-depth study of grid-based asteroseismic analysis
- Stellar ages and convective cores in field main-sequence stars: first asteroseismic application to two Kepler targets
- An asteroseismic signature of helium ionization
- Determination of stellar radii from asteroseismic Data
- Stroemgren survey for Asteroseismology and Galactic Archaeology: let the SAGA begin
- A Stellar Model-fitting Pipeline for Asteroseismic Data from the Kepler Mission
- Effects of errors in the solar radius on helioseismic inferences
- Kepler-68: Three Planets, One With a Density Between That of Earth and Ice Giants
- Measurement of acoustic glitches in solar-type stars from oscillation frequencies observed by Kepler
- Evidence for a sharp structure variation inside a red-giant star
- Asteroseismic determination of helium abundance in stellar envelopes
- Fundamental Parameters of Main-Sequence Stars in an Instant with Machine Learning
- Asteroseismic estimate of helium abundance of a solar analog binary system
- Seismic analysis of the second ionization region of helium in the Sun: I. Sensitivity study and methodology
- Precise Estimates of the Physical Parameters for the Exoplanet System HD-17156 Enabled by HST FGS Transit and Asteroseismic Observations
- Asteroseismic diagrams for solar-type stars
- Primordial Helium And the Cosmic Background Radiation
- Prospects for asteroseismic inference on the envelope helium abundance in red giant stars
- Seismic study of stellar convective cores
- Toward a New Kind of Asteroseismic Grid Fitting
- SpaceInn hare-and-hounds exercise: Estimation of stellar properties using space-based asteroseismic data
- Seismic detection of acoustic sharp features in the CoRoT target HD49933
- A Theoretical Study of Acoustic Glitches in Low-Mass Main-Sequence Stars
- Asteroseismic determination of fundamental parameters of sun-like stars using multi-layered neural networks
- What have we learned from helioseismology, what have we really learned, and what do we aspire to learn?
- Precise determination of fundamental parameters of six exoplanet host stars and their planets
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- Constraints on the properties of macroscopic transport in the Sun from combined lithium and beryllium depletion
- Properties of the ionisation glitch: I. Modelling the ionisation region
- Glitches in solar-like oscillating F-type stars: Theoretical signature of the base of the convective envelope on the ratios
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- Properties of the ionisation glitch II. Seismic signature of the structural perturbation
- Study with WhoSGlAd of the acoustic depth of the helium glitch across the seismic HR diagram and its impact on the inferred helium abundance
- Glitches in solar-like oscillating F-type stars: Possible contribution of non-linear terms
- Asteroseismology of low-mass stars: the balance between partial ionisation and Coulomb interactions
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- Advanced asteroseismic modelling: breaking the degeneracy between stellar mass and initial helium abundance
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