Research
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2023.08.15
How tides change the orbit of binaries and a new open-source code, gyre_tides, to model stellar tides 潮汐如何改变双星系统的轨道以及介绍一个新的用于计算恒星潮汐的开源代码gyre-tides
GYRE is an open-source stellar oscillation code that calculates wave frequencies and functions for the (unforced) natural modes of an input stellar model. Recently, the code's capabilities have been extended to encompass forced oscillations, allowing it to calculate the interior perturbations of a star caused by the gravitational field of a companion. The standard approach to simulating tides i...
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2023.08.14
Simulating the first stars, galaxies, and black holes in the Universe
Prof. John Wise from Georgia Tech and the director at the Center for Relativistic Astrophysics (CRA)Host: Song Huan
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2023.08.10
Dynamics of Transneptunian Objects under the Influence of a Rogue Planet (Thesis Talk) 海王星外天体在流浪行星影响下的动力学
Over the past two decades, our knowledge of the Solar System’s transneptunian region (often called the Kuiper Belt) has been gradually increasing. Observational surveys have greatly expanded the inventory of Trans-Neptunian Objects (TNOs), which are distant icy bodies thought to be relics from the giant planet formation era.In the distant Kuiper Belt, several striking features seem to challeng...
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2023.08.08
Can Artificial Intelligence Generate Meaningful Scientific Hypotheses?
The field of Artificial Intelligence (AI) has taken great strides in recent years, particularly with advancements in Large Language Models (LLMs) like ChatGPT. This progress has stirred much public curiosity. However, general-purpose language models like ChatGPT sometimes 'hallucinate' or invent non-existent information when handling specialized subjects. This tendency has led to a common belie...
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2023.08.08
Towards Optimal Inference of Cosmological Large Scale Structures with Neural Quantile Estimation
Traditional analysis of cosmological Large Scale Structures assumes that the likelihood is Gaussian, which unfortunately is not optimal and may even be biased in the non linear regime. Simulation Based Inference (SBI), also known as Likelihood Free Inference or Implicit Likelihood Inference, directly models the Bayesian optimal posterior, but typically needs a large number of simulations to con...
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