Structural and thermal models of rocky planets and solid exoplanets

该项目的目的是建立超地球系统中特定质量和半径的一般类地行星的内部结构和热收支模型以及类海王星行星的岩石/金属核心模型。固体的结构模型是化学分层的，由挥发性成分、成岩元素和金属（如铁）组成，后者集中在中心核中。在第一个供资期内，这些模型的参数化将基于导热率和膨胀率等热和传输特性、状态方程和相图数据，这些数据将在该研究单位的其他子项目中通过高压缩比下固体和液体物质的从头计算（SP1，SP2）和实验室实验（SP 7，SP 8）进行迭代改进。由于压力对粘度的影响，大质量超级地球的硅酸盐地幔中的对流能量传输可能效率低下，因此将详细研究内部产热、长期冷却和固有光度或表面热流之间的相互作用。为了部分克服模型的不确定性，计算的密度剖面将用于与SP 5和SP 6子项目密切合作确定长期或流体洛夫数k_{2，f}。后者是衡量质量向中心集中的重要指标，与受行星自转和潮汐影响的关键观测参数有关（SP 6）。通过这种方式，我们期望得到新的，改进的质量，半径，内部分化程度，大部分组成和热预算的近距离固体系外行星过境他们的宿主恒星之间的关系。

The project is aimed at the construction of models of the interior structure and thermal budget of generic terrestrial-type planets of given mass and radius in the super-Earth regime and of rock/metal cores of Neptune-like planets. Structural models of solid bodies are chemically layered and composed of volatile constituents, rock-forming elements, and metals such as iron, the latter concentrated in central cores. In the first funding period, the parameterization of these models will be based on thermal and transport properties such as thermal conductivity and expansivity, equation-of-state and phase diagram data that will be iteratively improved within other subprojects of this Research Unit through ab initio calculations (SP1, SP2) and laboratory experiments (SP7, SP8) of solid and liquid matter at high compression ratios. Since the convective energy transport in the silicate mantles of massive super-Earths could be inefficient owing to pressure effects on viscosity, the interplay between internal heat production, secular cooling and intrinsic luminosity or surface heat flow will be studied in detail. To partly overcome model ambiguities, the calculated density profiles will be used to determine in close collaboration with subprojects SP5 and SP6 the secular or fluid Love number k_{2,f}. The latter is an important measure for the concentration of mass toward the center and related to key observational parameters affected by planetary rotation and tides (SP6). In this way, we expect to derive novel, improved relationships between mass, radius, degree of internal differentiation, bulk composition and thermal budget of close-in solid exoplanets transiting their host stars.