On the low-mass planethood criterion |
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| Institution: | 1. Department of Physics, University of Split, N. Tesle 12, 21000 Split, Croatia;2. Thüringer Landessternwarte, Sternwarte 5, Tautenburg, 07778, Germany;3. Max-Planck Institute for extraterrestrial Physics, Giessenbachstrasse, Garching, 85741, Germany;4. Astrophysical Institute and Obervatory, Friedrich-Schiller University, Schillergäßchen 2-3, Jena, 07745, Germany;1. Institut fuer Planetenforschung, Berlin, Germany;2. Thueringer Landessternwarte Tautenburg, Tautenburg, Germany |
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| Abstract: | We propose a quantitative concept for the lower planetary boundary, requiring that a planet must keep its atmosphere in vacuum. The solution-set framework of Pec˘nik and Wuchterl 2005. Giant planet formation. A first classification of isothermal protoplanetary equilibria. Astron. Astrophys. 440, 1183–1194] enabled a clear and quantitative criterion for the discrimination of a planet and a minor body. Using a simple isothermal core-envelope model, we apply the proposed planetary criterion to the large bodies in the Solar System. |
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