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Asteroseismic measurement of the inclination angle: characterizing exoplanetary systems

Charlotte Gehan


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  <identifier identifierType="DOI">10.5281/zenodo.5568933</identifier>
  <creators>
    <creator>
      <creatorName>Charlotte Gehan</creatorName>
      <affiliation>Max-Planck-Institut fur Sonnensystemforschung</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Asteroseismic measurement of the inclination angle: characterizing exoplanetary systems</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2021</publicationYear>
  <contributors>
    <contributor contributorType="Researcher">
      <contributorName>Benoit Mosser</contributorName>
      <affiliation>LESIA, Observatoire de Paris</affiliation>
    </contributor>
    <contributor contributorType="Researcher">
      <contributorName>Eric Michel</contributorName>
      <affiliation>LESIA, Observatoire de Paris</affiliation>
    </contributor>
    <contributor contributorType="Researcher">
      <contributorName>Margarida Cunha</contributorName>
      <affiliation>Instituto de Astrofisica e Ciencias do Espaco, Centro de Astrofisica da Universidade do Porto</affiliation>
    </contributor>
  </contributors>
  <dates>
    <date dateType="Issued">2021-10-14</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Presentation</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/5568933</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.5281/zenodo.5568932</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://zenodo.org/communities/plato2021</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Information on stellar inclinations are of prime importance to characterize the formation and dynamics of transiting exoplanetary&amp;nbsp;systems, by helping to constrain the angle between the stellar spin axis and the planetary&amp;nbsp;orbit axis, namely the&amp;nbsp;obliquity. As PLATO will observe about 150 000 main-sequence stars potentially hosting&amp;nbsp;exoplanets, it is crucial to have at hand a&amp;nbsp;fast, robust and automated method to measure the stellar inclination angle.&lt;br&gt;
I will present the method I developed and the results I derived for almost 1200 red giant stars that have been&amp;nbsp;observed by the Kepler&amp;nbsp;space mission, which exhibit mixed modes offering the opportunity to obtain accurate measurements of the inclination angle&amp;nbsp;of the stellar rotation axis. I could characterize the biases affecting inclination&amp;nbsp;measurements, in particular for extreme values&amp;nbsp;close to 0 ◦ and 90 ◦ . This study allowed me to provide a way to infer&amp;nbsp;the underlying statistical distribution of inclinations for a&amp;nbsp;given sample of stars, free from observational limitations.&amp;nbsp;This method has the advantage to be able to derive&amp;nbsp;seismic&amp;nbsp;measurements of the&amp;nbsp;inclination angle for any solar-type&amp;nbsp;pulsator with identified oscillation modes.&lt;/p&gt;</description>
  </descriptions>
</resource>
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