Astronomy:Second generation planet
A second generation planet is a type of exoplanet that forms in a binary star system when one of the stars becomes a red giant and mass transfers from it to an accretion disk around the other star where the planet can form.[1][2] This accretion disk is referred to by the name second-generation disk as it is the second accretion disk to form around the star. The material within the second-generation disk contains more metal and dust than first proto stellar disks that normally form around stars due to the material ejected from the stellar winds of the older stars.[1] This results in the second-generation planets containing higher levels of metal and dust. The second-generation planets take approximately one million years to form from the disk of material. It is also possible for a third-generation disk to form even later in the binary system’s life.[1][3]
References
- ↑ 1.0 1.1 1.2 Perets, Hagai P. (27 January 2010). "Second generation planets". arXiv:1001.0581 [astro-ph.EP].
- ↑ Kluska, J.; Van Winckel, H.; Coppée, Q.; Oomen, G.-M.; Dsilva, K.; Kamath, D.; Bujarrabal, V.; Min, M. (February 2022). "A population of transition disks around evolved stars: Fingerprints of planets: Catalog of disks surrounding Galactic post-AGB binaries". Astronomy & Astrophysics 658: A36. doi:10.1051/0004-6361/202141690. Bibcode: 2022A&A...658A..36K.
- ↑ Ledda, Sebastiano; Danielski, Camilla; Turrini, Diego (2023-07-01). "The quest for Magrathea planets - I. Formation of second-generation exoplanets around double white dwarfs" (in en). Astronomy & Astrophysics 675: A184. doi:10.1051/0004-6361/202245827. ISSN 0004-6361. https://www.aanda.org/articles/aa/abs/2023/07/aa45827-22/aa45827-22.html.
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