Poster Open Access

Similarity of multi-planetary systems

Jon F. Otegi; François Bouchy; Ravit Helled

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  <identifier identifierType="DOI">10.5281/zenodo.5561371</identifier>
      <creatorName>Jon F. Otegi</creatorName>
      <affiliation>Universities of Geneva &amp; Zurich</affiliation>
      <creatorName>François Bouchy</creatorName>
      <affiliation>University of Geneva</affiliation>
      <creatorName>Ravit Helled</creatorName>
      <affiliation>University of Zurich</affiliation>
    <title>Similarity of multi-planetary systems</title>
    <date dateType="Issued">2021-10-11</date>
  <resourceType resourceTypeGeneral="Text">Poster</resourceType>
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    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.5281/zenodo.5561370</relatedIdentifier>
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    <rights rightsURI="">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
    <description descriptionType="Abstract">&lt;p&gt;Previous studies using Kepler data suggest that planets orbiting the same star tend to have similar sizes. However, due to the faintness of the stars, only a few of the planets were also detected with radial velocity follow-ups, and therefore the planetary masses were mostly unknown. It therefore yet to be determined whether planetary systems indeed behave as &amp;quot;peas in a pod&amp;quot;.&amp;nbsp;&lt;br&gt;
&amp;nbsp;Follow-up programs of TESS targets significantly increased the number of confirmed planets with mass measurements, allowing for a more detailed statistical analysis of multi-planet systems. In this work we explore the similarity in radii, masses, densities, and period ratios of planets within planetary systems.&amp;nbsp;&lt;br&gt;
&amp;nbsp;We &amp;nbsp;show that planets in the same system that are similar in radii could be rather different in mass and vice versa. Nevertheless, planets are somewhat &amp;nbsp;similar in mass up to masses of ~100Me and radii of ~10Re. We find that in general, the planetary radii of a given planetary system are more similar than the masses. &amp;nbsp;We conclude that other quantities like the density may be crucial to fully understand the nature of planetary systems and that, due to the diversity of planets within a planetary system, increasing the number of detected systems is crucial for understanding the exoplanetary demographics.&amp;nbsp;&lt;/p&gt;</description>
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