3D Radiative Hydrodynamics Modeling of Convection of Stars to Probe Their Interiors and Photospheric Properties

Kitiashvili, Irina

关键词: ACOUSTIC VELOCITY;    RADIATIVE TRANSFER;    HYDRODYNAMICS;    HYDRODYNAMIC EQUATIONS;    MATHEMATICAL MODELS;    MAIN SEQUENCE STARS;    STELLAR CONVECTION;    STELLAR MODELS;    INTERNAL ENERGY;    THREE DIMENSIONAL MODELS;    TURBULENCE EFFECTS;    VELOCITY DISTRIBUTION;    VERTICAL MOTION;    WAVE EXCITATION;   

RP-ID  :  ARC-E-DAA-TN66281

学科分类：空间科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The dramatic flow of data from the Kepler and K2 missions opens the opportunity to significantly improve our knowledge of stellar interiors, surface dynamics, and structure. However, interpretation of these observations is a challenging task because it depends on tiny effects that can be studied only with advanced first-principles modeling. We present results of 3D time-dependent radiative hydrodynamic simulations of stellar outer convection zones and atmospheres taking into account chemical composition, radiative transfer, turbulence effects, and a realistic equation of state for main sequence stars. We will discuss properties of convective structure and dynamics, convective overshoot, effects of magnetic fields and rotation, as well as the potential influence of turbulent surface dynamics on high-precision RV measurements.