The mass-radius relation of exoplanets revisited

Article Article scientifique Article The mass-radius relation of exoplanets revisited eng 2024-06-21 2024-06-21 author Mueller Simon 0000-0002-8278-8377 700288 author Baron Jana Anouk 406913 author Helled Ravit 0000-0001-5555-2652 author Bouchy François 0000-0002-7613-393X 133687 Département d'astronomie (ASTRO) author Parc Léna Romane Elisa 0000-0002-7382-1913 402592 Département d'astronomie (ASTRO) A296 10.1051/0004-6361/202348690 0004-6361 https://www.aanda.org/10.1051/0004-6361/202348690 Determining the mass–radius ( M − R ) relation of exoplanets is important for exoplanet characterization. Here, we present a re-analysis of the M − R relations and their transitions using exoplanetary data from the PlanetS catalog, which accounts only for planets with reliable mass and radius determination. We find that “small planets” correspond to planets with masses of up to ~4.4 M ⊕ (within 17%) where R ∝ M 0.27 . Planets with masses between ~4.4 and 127 M ⊕ (within 5%) can be viewed as “intermediate-mass” planets, where R ∝ M 0.67 . Massive planets, or gas giant planets, are found to have masses beyond 127 M ⊕ and an M − R relation of R ∝ M −0.06 . By analyzing the radius-density relation we also find that the transition from “small” to “intermediate” planets occurs at a planetary radius of ~1.6 R ⊕ (within 3%). Our results are consistent with previous studies’ results and provide an ideal fit for the current measured planetary population. Dewey 520 Swiss National Science Foundation Towards a better understanding of Uranus & Neptune and intermediate-mass exoplanets 215634 CH Projects 26 Département d'astronomie 12 false Astronomy & astrophysics 686 cf21aac4-1615-4473-82d8-4bb097c3a93e Article (Published version) Public Article_scientifique_from_crossref.pdf 682231 application/pdf CC BY-4.0 2f4c0053cc7a6d2d73c236329df1354ec019cbf1ef31d7b510abd295ee13b32b openAccess Faculté des sciences / Département d'astronomie

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The mass-radius relation of exoplanets revisited	Astronomy & astrophysics			2024	18	1,285

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Mueller, Simon