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- W4300511768 abstract "In protoplanetary discs, planetary cores must be at least 0.1 earth mass at 1 au for migration to be significant; this mass rises to 1 earth mass at 5 au. Planet formation models indicate that these cores form on million year timescales. We report here a study of the evolution of 0.1 earth mass and 1 earth mass cores, migrating from about 2 and 5 au respectively, in million year old photoevaporating discs. In such a disc, a gap opens up at around 2 au after a few million years. The inner region subsequently accrete onto the star on a smaller timescale. We find that, typically, the smallest cores form systems of non-resonant planets beyond 0.5 au with masses up to about 1.5 earth mass. In low mass discs, the same cores may evolve in situ. More massive cores form systems of a few earth masses planets. They migrate within the inner edge of the disc gap only in the most massive discs. Delivery of material to the inner parts of the disc ceases with opening of the gap. Interestingly, when the heavy cores do not migrate significantly, the type of systems that are produced resembles our solar system. This study suggests that low mm flux transition discs may not form systems of planets on short orbits but may instead harbour earth mass planets in the habitable zone." @default.
- W4300511768 created "2022-10-03" @default.
- W4300511768 creator A5003778318 @default.
- W4300511768 date "2016-09-20" @default.
- W4300511768 modified "2023-10-18" @default.
- W4300511768 title "On the formation of planetary systems in photoevaporating transition discs" @default.
- W4300511768 doi "https://doi.org/10.48550/arxiv.1609.06056" @default.
- W4300511768 hasPublicationYear "2016" @default.
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