Radiogenic heating of comet 67P/Churyumov-Gerasimenko and implications for its formation time
Résumé
We investigate how heat generated by the radioactive decay of 26Al and 60Fe influences the formation of comet 67P/Churyumov-Gerasimenko, as a function of its accretion time and size of parent body. To fully preserve its volatile content, we find that either 67P/Churyumov-Gerasimenko’s formation was delayed between ∼2.2 and 7.7 Myr after that of Ca-Al-rich Inclusions (CAIs) in the protosolar nebula, depending on the primordial size of its parent body and the composition of the icy material considered.
Domaines
Planète et Univers [physics]| Origine | Fichiers produits par l'(les) auteur(s) |
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