2014/11/14 by Andreas Becker, Winfried Lorenzen, Jonathan J. Fortney +3 · 3 citations
Physics and Astronomy · #Ab initio #Astrophysics and Star Formation Studies #Brown dwarf #Equation of state #Gas giant #Helium #Hydrogen #Planet #Scientific Research and Discoveries #Stellar, planetary, and galactic studies #astro-ph.EP
paper · pdf · doi:10.1088/0067-0049/215/2/21
published as ApJS 215, 21 (2014) · 14 pages, 19 Figures, accepted at ApJS
arxiv created 2014/11/14 · openalex publication_date 2014/12/02 · arxiv updated 2014/12/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present new equations of state (EOSs) for hydrogen and helium covering a wide range of temperatures from 60 K to 10 7 K and densities from 10 −10 g cm −3 to 10 3 g cm −3 . They include an extended set of ab initio EOS data for the strongly correlated quantum regime with an accurate connection to data derived from other approaches for the neighboring regions. We compare linear mixing isotherms based on our EOS tables with available real mixture data. A first important astrophysical application of this new EOS data is the calculation of interior models for Jupiter and comparison with recent results. Second, mass–radius relations are calculated for Brown Dwarfs (BDs) which we compare with predictions derived from the widely used EOS of Saumon, Chabrier, and van Horn. Furthermore, we calculate interior models for typical BDs with different masses, namely, Corot-3b, Gliese-229b, and Corot-15b, and the giant planet KOI-889b. The predictions for the central pressures and densities differ by up to 10% dependent on the EOS used. Our EOS tables are made available in the supplemental material of this paper.