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EP: Fachverband Extraterrestrische Physik
EP 1: Planets and small Objects
EP 1.2: Vortrag
Montag, 20. März 2023, 11:15–11:30, HSZ/0004
Material properties of matter in Saturn's interior from ab initio simulations — •Martin Preising1, Martin French1, Christopher Mankovich2, Francois Soubiran3, and Ronald Redmer1 — 1Universität Rostock, Rostock, Germany — 2California Institute of Technology, Pasadena, USA — 3Commissariat à l'énergie atomique et aux énergies alternatives, Arpajon, France
Calculation of material properties from ab inito simulations along Jupiter [1] and Brown Dwarf adiabats [2] have been subject of earlier studies. However, accurate models of Saturn's interior are still very challenging. A recent study by Mankovich and Fortney on Jupiter and Saturn models was based on a single physical model [3] which predicts a strongly differentiated helium distribution in Saturn's deep interior, resulting in a helium-rich shell above a diffuse core.
We focus on the calculation of material properties of matter at P-T conditions along the Saturn model proposed by Mankovich and Fortney. We present results on thermodynamic and transport properties of a hydrogen-helium-water mixture that closely resembles the element distribution of the Saturn model. We discuss implications of the results on our understanding of Saturn's interior and evolution.
[1] French et al., Astrophys. J. Suppl. Ser., 202, 5 (2012). [2] Becker et al., Astron. J., 156, 149 (2018). [3] Mankovich and Fortney, Astrophys. J., 889, 51 (2020). [4] Monserrat et al., Phys. Rev. Lett., 112, 055504 (2014). [5] Preising and Redmer, Phys. Rev. B, 102, 224107 (2020).