{
  "id": "2102.11272",
  "version": "v1",
  "published": "2021-02-22T18:57:21.000Z",
  "updated": "2021-02-22T18:57:21.000Z",
  "title": "A comparison of the dynamical and model-derived parameters of the pulsating eclipsing binary KIC9850387",
  "authors": [
    "S. Sekaran",
    "A. Tkachenko",
    "C. Johnston",
    "C. Aerts"
  ],
  "comment": "21 pages, 18 figures, accepted for publication in A&A",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We aim to unravel the interior mixing profile of the pulsating eclipsing binary KIC9850387 by comparing its dynamical parameters and the parameters derived through a combination of evolutionary and asteroseismic modelling. We created a grid of stellar evolutionary models using the stellar evolutionary code \\textsc{mesa} and performed an isochrone-cloud (isocloud) based evolutionary modelling of the system. We then generated a grid of pulsational models using the stellar pulsation code \\textsc{gyre} based on the age constraints from the evolutionary modelling. Finally, we performed asteroseismic modelling of the observed $\\ell=1$ and $\\ell=2$ period-spacing patterns, utilising different combinations of observational constraints, merit functions, and asteroseismic observables to obtain strong constraints on the interior properties of the primary star. Through a combination of asteroseismic modelling and dynamical constraints, we found that the system comprises two main-sequence components at an age of $1.2\\pm0.1$ Gyr. We also observed that asteroseismic modelling provided stronger constraints on the interior properties than evolutionary modelling. Overall, we found high levels of interior mixing and posited that this is a result of intrinsic non-tidal mixing mechanisms due to a similar observed behaviour in single stars. We investigated the high-frequency regime of KIC9850387 and found evidence of the surface effect as well as rotational splitting in the form of a prograde-retrograde dipole g$_{1}$ mode doublet with a missing zonal mode. We find that the dynamical parameters and the parameters extracted from the asteroseismic modelling of period-spacing patterns are only barely compliant, reinforcing the need for homogeneous analyses of samples of pulsating eclipsing binaries that aim to calibrating interior mixing profiles.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-02-22T18:57:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pulsating eclipsing binary kic9850387",
      "asteroseismic modelling",
      "model-derived parameters",
      "constraints",
      "comparison"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}