Mean density inversions for red giants and red clump stars

Abstract

Since the CoRoT and Kepler missions, the availability of high quality seismic spectra for red giants has made them the standard clocks and rulers for Galactic Archeology. With the expected excellent data from the TESS and PLATO missions, red giants will again play a key role in Galactic studies and stellar physics, thanks to the precise masses and radii determined by asteroseismology. The determination of these quantities is often based on so-called scaling laws, which have been used extensively for main-sequence stars. We show how the SOLA inversion technique can provide robust determinations of the mean density of red giants within 1 per cent of the real value, using only radial oscillations. Combined with radii determinations from Gaia of around 2 per cent precision, this approach provides robust, less model-dependent masses with an error lower than 10 per cent. It will improve age determinations, helping to accurately dissect the Galactic structure and history. We present results on artificial data of standard models, models including an extended atmosphere from averaged 3D simulations and non-adiabatic frequency calculations to test surface effects, and on eclipsing binaries. We show that the inversions provide very robust mean density estimates, using at best seismic information. However, we also show that a distinction between red-giant branch and red-clump stars is required to determine a reliable estimate of the mean density. The stability of the inversion enables an implementation in automated pipelines, making it suitable for large samples of stars.

arXiv commentAccepted for publication in MNRAS

References in corpus (45)

• The chemical composition of the Sun
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• Low Temperature Opacities
• Astrophysics Source Code Library
• The PLATO 2.0 Mission
• Solar fusion cross sections II: the pp chain and CNO cycles
• Element Diffusion in the Solar Interior
• Updated Electron-Conduction Opacities: The Impact on Low-Mass Stellar Models
• Spin down of the core rotation in red giants
• ADIPLS -- the Aarhus adiabatic oscillation package
• Seismic constraints on the radial dependence of the internal rotation profiles of six Kepler subgiants and young red giants
• Asteroseismology of old open clusters with Kepler: direct estimate of the integrated RGB mass loss in NGC6791 and NGC6819
• Correcting stellar oscillation frequencies for near-surface effects
• Seismic diagnostics for transport of angular momentum in stars 1. Rotational splittings from the PMS to the RGB
• Preparation of Kepler lightcurves for asteroseismic analyses
• CLES, Code Liegeois d'Evolution Stellaire
• A new correction of stellar oscillation frequencies for near-surface effects
• A New Generation of Los Alamos Opacity Tables
• Testing the asteroseismic scaling relations for Red Giants with Eclipsing Binaries Observed by Kepler
• Oscillation frequencies for 35 \Kepler solar-type planet-hosting stars using Bayesian techniques and machine learning
• Red giants observed by CoRoT and APOGEE: The evolution of the Milky Way's radial metallicity gradient
• The Liege Oscillation Code
• Seismic diagnostics for transport of angular momentum in stars 2. Interpreting observed rotational splittings of slowly-rotating red giant stars
• Determining stellar parameters of asteroseismic targets: going beyond the use of scaling relations
• NGC 6819: testing the asteroseismic mass scale, mass loss, and evidence for products of non-standard evolution
• Galactic Archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
• PLATO as it is: a legacy mission for Galactic archaeology
• Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. I. Three eclipsing systems at [Fe/H]~ -0.3 and the need for a large high-precision sample
• Surface-effect corrections for solar-like oscillations using 3D hydrodynamical simulations
• Changing the ${\nu }_{\max }$ Scaling Relation: The Need For a Mean Molecular Weight Term
• On the choice of parameters in solar structure inversion
• Theoretical power spectra of mixed modes in low mass red giant stars
• Why should we correct reported pulsation frequencies for stellar line-of-sight Doppler velocity shifts?
• MESA meets MURaM: Surface effects in main-sequence solar-like oscillators computed using three-dimensional radiation hydrodynamics simulations
• Estimating stellar mean density through seismic inversions
• The Red-Giant Branch Bump Revisited: Constraints on Envelope Overshooting in a Wide Range of Masses and Metallicities
• Testing Asteroseismic Scaling Relations using Eclipsing Binaries in Star Clusters and the Field
• On the magnitude difference between the main sequence turn off and the red giant branch bump in Galactic globular clusters
• Asteroseismology of red giants: from analysing light curves to estimating ages
• SpaceInn hare-and-hounds exercise: Estimation of stellar properties using space-based asteroseismic data
• Stellar acoustic radii, mean densities and ages from seismic inversion techniques
• In-depth study of 16CygB using inversion techniques
• Constraints on the structure of 16 Cyg A and 16 Cyg B using inversion techniques
• Solar-like oscillating stars as standard clocks and rulers for Galactic studies
• Table of Contents of: "Asteroseismology of Stellar Populations in the Milky Way"

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• The Helium Abundance of NGC 6791 from Modeling of Stellar Oscillations
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• CORALIE radial-velocity search for companions around evolved stars (CASCADES). I. Sample definition and first results: Three new planets orbiting giant stars
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• The key impact of the host star's rotational history on the evolution of TOI-849b
• 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
• Coralie radial-velocity search for companions around evolved stars (CASCADES) III. A new Jupiter host-star: in-depth analysis of HD 29399 using TESS data
• Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. II. Revised stellar masses and radii for KIC 8430105
• Relevance of the small frequency separation for asteroseismic stellar age, mass, and radius. A statistical investigation for main-sequence low-mass stars
• Advancing accuracy in age determinations of old-disk stars using an oscillating red giant in an eclipsing binary
• The stellar activity-rotation-age relationship under the lens of asteroseismology
• Coralie radial velocity search for companions around evolved stars (CASCADES) II. Seismic masses for three red giants orbited by long-period massive planets
• Influence of the magnetic activity cycle on mean density and acoustic radius inversions
• Weighing stars from birth to death: mass determination methods across the HRD
• Revisiting Kepler-444 Part I. Seismic modelling and inversions of stellar structure
• Asteroseismic modelling of main-sequence solar-like stars and Kepler exoplanet host stars with the FICO procedure I. Catalogue of fundamental stellar properties
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