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Asteroseismic measurement of the inclination angle: characterizing exoplanetary systems

Charlotte Gehan


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{
  "publisher": "Zenodo", 
  "DOI": "10.5281/zenodo.5568933", 
  "author": [
    {
      "family": "Charlotte Gehan"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2021, 
        10, 
        14
      ]
    ]
  }, 
  "abstract": "<p>Information on stellar inclinations are of prime importance to characterize the formation and dynamics of transiting exoplanetary&nbsp;systems, by helping to constrain the angle between the stellar spin axis and the planetary&nbsp;orbit axis, namely the&nbsp;obliquity. As PLATO will observe about 150 000 main-sequence stars potentially hosting&nbsp;exoplanets, it is crucial to have at hand a&nbsp;fast, robust and automated method to measure the stellar inclination angle.<br>\nI will present the method I developed and the results I derived for almost 1200 red giant stars that have been&nbsp;observed by the Kepler&nbsp;space mission, which exhibit mixed modes offering the opportunity to obtain accurate measurements of the inclination angle&nbsp;of the stellar rotation axis. I could characterize the biases affecting inclination&nbsp;measurements, in particular for extreme values&nbsp;close to 0 \u25e6 and 90 \u25e6 . This study allowed me to provide a way to infer&nbsp;the underlying statistical distribution of inclinations for a&nbsp;given sample of stars, free from observational limitations.&nbsp;This method has the advantage to be able to derive&nbsp;seismic&nbsp;measurements of the&nbsp;inclination angle for any solar-type&nbsp;pulsator with identified oscillation modes.</p>", 
  "title": "Asteroseismic measurement of the inclination angle: characterizing exoplanetary systems", 
  "type": "speech", 
  "id": "5568933"
}
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