学术报告第168期：Consistent Microphysics in Astrophysical Simulations: Why we need it, how we make it, and where we use it

主讲人 (Speaker): 

王力乐

主讲人单位 (Speaker's Institute): 

Center for Computational Astrophysics, Flatiron Institute

邀请人 (Invited by): 

高扬

时间 (Time): 

星期二, 2019/12/24 - 15:00 to 16:00

地点 (Location): 

珠海校区海滨红楼17栋107 (Rm 107, Red House 17)

摘要 (Abstract): 

Consistent time-dependent modeling of microphysics, especially tensorial conductivity, thermochemistry, and radiation, becomes increasingly desired by emerging astrophysical research, aiming at improved understanding towards a variety of astrophysical processes. In this talk, I will introduce the need of these simulations, and our efforts of implementing Microthena, the GPU-accelerated numerical infrastructures for microphysics. Their applications in the research of protoplanetary disks (PPDs) will be discussed. I will emphasize the comprehensive, thermochemistry-coupled dynamics of PPDs, in the modeling of photoevaporative and/or MHD-dominated wind-launching dispersal processes. Using these tools, our discoveries in exoplanetary atmospheres will also be presented, including our proposed model of “super-puff” exoplanets. Moreover, our current efforts of conducting cosmological simulations on Microthena are expected to shed lights on currently unresolved "sub-grid physics" and hence to prepare for intensity mapping observations of the upcoming decade. These simulations, with their rich details in thermochemical profiles, are promising for future attempts to bridge current theoretical models to observations.

主讲人简介 (Speaker's CV): 

本科毕业于清华大学，博士毕业于普林斯顿大学，现任Flatiron研究所Flatiron研究学者。