2024年11月27日， 周三15:30-17:00紫金港西区海纳苑8幢324    Tracing the baryonic cycle in and around galaxies using radiation hydrodynamic simulations李辉（清华大学）Abstract：The cycling of gas in and around galaxies plays a critical role in their evolution. For galaxies smaller than the Milky Way, the complex baryonic cycle is believed to be driven by feedback from young stars. To fully understand this highly non-linear process, it is necessary to employ multi-scale, multi-physics simulations. In this talk, I will first provide a brief overview of the current state of galaxy formatio...

2024年11月21日， 周四15:30-17:00紫金港西区海纳苑8幢324Numerical Simulations of Dynamical Processes on Various Astrophysical Scales刘尚飞（中山大学）Abstract：Similar dynamical processes occur across different context in astrophysical studies, ranging from planets to black holes. Due to the nonlinear nature of these processes, numerical simulations serve as powerful tools for investigating their roles in the evolution of astrophysical systems. In this talk, I will present our hydrodynamic and N-body simulations of relevant processes. In particular, I will discuss some observational implications...

2024年11月14日，周四15:30-17:00紫金港西区海纳苑8幢324New Frontiers of Dark Matter Halo (暗物质晕的新前沿）韩家信（上海交通大学）Abstract：Current theoretical understandings of the nonlinear structure formation and galaxy formation processes are largely built upon a central concept that dark matter in the Universe are mostly contained in virialized clumps called dark matter halos, with the boundary of a halo described by its virial radius. However, the growth of a halo means it is inevitably surrounded by a non-virialized envelope of freshly accreted material. Failing to account for this envelo...

2024年10月10日， 周四15:30-17:00紫金港西区海纳苑8幢324Multiphysics, Hetrogeneous, and Performance: The Incoming Step of Astrophysical Simulations王力乐（北京大学）Abstract：The new era of astronomy observation desires numerical simulations with unprecedented spatial resolution and inclusion for multiphysics. This presentation introduces KRATOS, a state-of-the-art high-performance heterogeneous simulation system developed by the speaker. KRATOS is distinguished by its meticulously crafted one-sided coupling mechanism that integrates seamlessly with geometrical and physical modules, culminating ...

2024年11月7日， 周四15:30-17:00紫金港西区海纳苑8幢324Science capability and selected early results of the Einstein Probe mission 袁为民（国家天文台）Abstract：Launched on January 9th, 2024, the Einstein Probe (EP) is a space X-ray observatory designed to detect mainly high-energy transient and variable sources in the universe. It aims at detecting such sources at unprecedented sensitivity and spatial resolution in the soft X-ray band and performing quick onboard follow-up observations in X-rays. EP carries two instruments, a wide-field X-ray telescope (WXT) to monitor the soft X-ray sky in 0.5...

2024年10月24日， 周四15:30-17:00紫金港西区海纳苑8幢324Searching for “Lonely” Dark Objects with Microlensing东苏勃（北京大学）Abstract：Galactic microlensing is the only known method to discover dark objects ranging from isolated stellar-mass black holes (BHs) down to Earth-mass free-floating planets (FFPs). The recent success of interferometric resolution of microlensed images with VLTI opens up a new venue for discovering isolated stellar remnants. I discuss how the VLTI-GRAVITY(+) instrument can significantly advance such discoveries, potentially leading to measuring the mass function of i...

2024年10月16日， 周三15:30-17:00紫金港西区海纳苑8幢324Hyper-Millennium project: a hyper cosmological simulation for the next generation of large-scale structure survey郭琦（国家天文台）Abstract：Dark matter and dark energy are among the most important cutting-edge sciences. Extensive global efforts have been dedicated to the large-scale structure evolution through projects like LSST, DESI, Euclid, PFS, and the Chinese space station optical survey. We have successfully completed a N-body cosmological simulation that traces 4 trillion particles from redshift 100 to the present day within a 2.5 G...

2024年10月10日， 周四14:00-15:30紫金港西区海纳苑8幢324A Dynamic View of Galaxy Clusters – From the Cores to the Outskirts张从尧 (University of Chicago)Abstract：Galaxy clusters, as massive, virialized halos within the cosmic web, serve as ideal laboratories for advancing our understanding of cosmology, plasma physics, and the nature of dark matter. The study of their formation and evolution stands as one of the frontiers of modern astrophysics. In this talk, I will cover several key topics in cluster studies, from the activities of supermassive black holes at cluster centers to accretion and v...