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Verfasst von:Chevance, Mélanie [VerfasserIn]   i
 Kruijssen, Diederik [VerfasserIn]   i
 Longmore, Steven N. [VerfasserIn]   i
Titel:When the peas jump around the pod
Titelzusatz:how stellar clustering affects the observed correlations between planet properties in multiplanet systems
Verf.angabe:Mélanie Chevance, J.M. Diederik Kruijssen, and Steven N. Longmore
E-Jahr:2021
Jahr:2021 April 6
Umfang:9 S.
Teil:volume:910
 year:2021
 number:2
 elocationid:L19
 pages:1-9
 extent:9
Fussnoten:Gesehen am 06.05.2021
Titel Quelle:Enthalten in: The astrophysical journal / 2
Ort Quelle:London : Institute of Physics Publ., 1995
Jahr Quelle:2021
Band/Heft Quelle:910(2021), 2, Artikel-ID L19, Seite 1-9
ISSN Quelle:2041-8213
Abstract:Recent studies have shown that the radii and masses of adjacent planets within a planetary system are correlated. It is unknown how this “peas-in-a-pod” phenomenon originates, whether it is in place at birth or requires evolution, and whether it (initially) applies only to neighboring planets or to all planets within a system. Here we address these questions by making use of the recent discovery that planetary system architectures strongly depend on ambient stellar clustering. Based on Gaia's second data release, we divide the sample of planetary systems hosting multiple planets into those residing in stellar position-velocity phase space overdensities and the field, representing samples with elevated and low degrees of external perturbation, respectively. We demonstrate that the peas-in-a-pod phenomenon manifests itself in both samples, suggesting that the uniformity of planetary properties within a system is not restricted to direct neighbors and likely already exists at birth. The radius uniformity is significantly elevated in overdensities, suggesting that it can be enhanced by evolutionary effects that either have a similar impact on the entire planetary system or favor the retention of similar planets. The mass uniformity may exhibit a similar, but weaker dependence. Finally, we find ordering in both samples, with the planet radius and mass increasing outwards. Despite its prevalence, the ordering is somewhat weaker in overdensities, suggesting that it may be disrupted by external perturbations arising from stellar clustering. We conclude that a comprehensive understanding of the peas-in-a-pod phenomenon requires linking planet formation and evolution to the large-scale stellar and galactic environment.
DOI:doi:10.3847/2041-8213/abee20
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.3847/2041-8213/abee20
 DOI: https://doi.org/10.3847/2041-8213/abee20
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1757265783
Verknüpfungen:→ Zeitschrift

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