Age and convective core overshooting calibrations in CPD-54 810 binary system. Statistical investigation on the solution robustness

Abstract

Relying on precise observations for the CPD-54 810 binary system, we investigate the robustness of the estimated age and convective core overshooting for a system with both stars on the main sequence (MS). [...] We adopt the SCEPtER pipeline, based on grids of stellar models computed for a different initial chemical composition and convective core overshooting efficiency. The base fit suggests a common age of $3.02\pm 0.15$ Gyr, in agreement with recent literature. This estimated convective core overshooting parameter is $\beta =0.09\pm 0.01$, with a corresponding convective core mass $M_c=0.059_{-0.021}^{+0.017}$ $M_{\odot }$. The robustness of these estimates were tested assuming a narrow constraint on the helium-to-metal enrichment ratio. The chemical solution of the system changes, but the age and the overshooting parameter are almost unchanged ($3.08_{-0.14}^{+0.17}$ Gyr and $0.09\pm 0.01$). In a further test, we halved the uncertainty as to the effective temperature of both stars and again the estimated parameter shows only small variations ($3.02\pm 0.12$ Gyr and $0.09\pm 0.01$). This low variability suggests that the age of the system with both stars in the MS can be reliably estimated at a 5\% level, but it also indicates that the power of the investigation is probably low. [...] Despite the great increase in the observational constraints' precision, the results support the conclusions of previous theoretical works on the stellar parameter calibration with double MS star binary systems.

arXiv commentAccepted for publication in A&A. Abstract abridged

References in corpus (30)

• The chemical composition of the Sun
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• The Transiting Exoplanet Survey Satellite
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• The NextGen Model Atmosphere grid for $3000\le \Teff \le 10000\K$
• Towards Better Age Estimates for Stellar Populations: The Y^2 Isochrones for Solar Mixture
• The effective temperature scale of FGK stars. II. Teff : color : [Fe/H] calibrations
• The Updated BaSTI Stellar Evolution Models and Isochrones: I. Solar Scaled Calculations
• Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
• Revised Primordial Helium Abundance Based on New Atomic Data
• PARSEC V2.0: Stellar tracks and isochrones of low and intermediate mass stars with rotation
• The Pisa Stellar Evolution Data Base for low-mass stars
• The dependence of convective core overshooting on stellar mass: semi-empirical determination using the diffusive approach with two different element mixtures
• Toward a consistent use of overshooting parametrizations in 1D stellar evolution codes
• Confronting uncertainties in stellar physics: calibrating convective overshooting with eclipsing binaries
• Uncertainties in grid-based estimates of stellar mass and radius. SCEPtER: Stellar CharactEristics Pisa Estimation gRid
• Statistical errors and systematic biases in the calibration of the convective core overshooting with eclipsing binaries. A case study: TZ Fornacis
• SpaceInn hare-and-hounds exercise: Estimation of stellar properties using space-based asteroseismic data
• Confronting uncertainties in stellar physics II. exploring differences in main-sequence stellar evolution tracks
• Convective boundary mixing in main-sequence stars: theory and empirical constraints
• Significant uncertainties from calibrating overshooting with eclipsing binary systems
• Examining the relationships between colour, $T_{\mathrm{eff}}$, and [M/H] for APOGEE K and M dwarfs
• Fundamental effective temperature measurements for eclipsing binary stars I. Development of the method and application to AI Phoenicis
• Calibrating convective-core overshooting with eclipsing binary systems. The case of low-mass main-sequence stars
• On the age of Galactic bulge microlensed dwarf and subgiant stars
• Bayesian calibration of the mixing length parameter ${\alpha }_{ML}$ and of the helium-to-metal enrichment ratio $\Delta Y/\Delta Z$ with open clusters: the Hyades test-bed
• Grid-based estimates of stellar ages in binary systems. SCEPtER: Stellar CharactEristics Pisa Estimation gRid
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XI. CHIRON investigation of long-period binaries
• Fundamental effective temperature measurements for eclipsing binary stars -- II. The detached F-type eclipsing binary CPD-54 810

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