Melting behaviour of the candidate minerals for planetary models

Frontiers in Theoretical and Applied Physics/UAE 2017

Arafin, S.^1 ; Singh, R.N.^1

Physics Department, College of Science, Sultan Qaboos University, Box:36, Al-Khoudh 123, Muscat, Oman^1

关键词: Exo-planets;    Giant planets;    High pressure;    Pressure dependence;    Pressure ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/869/1/012064/pdf
DOI  :  10.1088/1742-6596/869/1/012064

来源: IOP

【 摘 要 】

The discovery of super-Earths and extra solar giant planets has made high pressure physics relevant for determining the formation and composition of these planets.We have developed a model to determine the pressure dependence of melting temperature, Tmand the Debye temperature, ΘDof materials utilizing Grüneisen parameter, ξ and the bulk modulus, B as the basic ingredients. The formalism has been applied to estimate the pressure dependence of melting temperature and Debye temperature of one of the candidate minerals such as quartz (stishovite, SiO2). The pressure range used in the present study is 0-6000GPa commensurate with the interior pressures of giant exoplanets. The results show an excellent agreement with the available experimental and other theoretical results.