October 11, 2021 Poster Open Access

Jon F. Otegi; François Bouchy; Ravit Helled

DCAT Export

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        <foaf:name>Jon F. Otegi</foaf:name>
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        <foaf:name>François Bouchy</foaf:name>
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        <foaf:name>Ravit Helled</foaf:name>
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    <dct:title>Similarity of multi-planetary systems</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2021-10-11</dct:issued>
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    <dct:description>&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;</dct:description>
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