首页
-
2026.01.06
CPUs to GPUs: Transforming Star Formation Simulations with QUOKKA
the past two decades, large-scale numerical simulations on parallel CPU clusters have been crucial for our theoretical understanding of star formation and stellar feedback. As modern supercomputers increasingly pivot toward GPU-dominated architectures, it has become essential to redesign our simulation tools to this new architecture in order to scale up these simulations. In this talk, I will g...
详情 -
2026.01.07
Variations of the Stellar Mass Function in the Milky Way Halo
I will show that the low-mass stellar mass function in the Milky Way halo using a clean sample of metal-poor main-sequence stars from Gaia DR3 BP/RP (XP) spectra within 1 kpc. Combining probabilistic kinematic halo selection with XP-based [Fe/H] calibrated to SDSS-V/APOGEE, and a forward model with effective volumes, we find that below 0.5 solar mass the halo MF changes strongly with metallicit...
详情 -
2026.01.07
DESI cosmology review
The Dark Energy Spectroscopic Instrument (DESI) has constructed the largest 3D map of galaxies and quasars to date, spanning the nearby Universe to a redshift of over 3. Recently, DESI has released cosmological measurements from its third-year (Y3) data, revealing evidences of dynamic dark energy. In this talk, I will review the DESI results, discuss potential problems and future developments.H...
详情 -
2025.12.23
The non-thermal physics of cosmic rays and magnetic fields in galaxy formation and evolution
Notoriously difficult to constrain with observations and physically intricate to model in simulations, the non-thermal physics of cosmic rays (CRs) and magnetic fields (B-fields), and their effects on galaxies, remain mostly elusive. The study of these processes is timely and scientifically exigent. Current simulations are able to evolve CRs with magnetic fields in tandem with feedback from sta...
详情 -
2025.12.19
主流极低温制冷技术及其典型应用
随着量子技术的兴起以及天文观测等前沿研究的进一步深入，对于极低温技术的需求愈加旺盛。目前主要应用集中在20mK-300mK制冷温区，冷量大小在数μW至数百μW量级。主流的极低温制冷机包括吸附制冷机（250mK-1K）、绝热去磁制冷机(>30mK)以及稀释制冷机（>5mK）。本报告主要介绍三种极低温制冷技术以及近年来相关领域的代表性进展，同时介绍极低温技术的典型应用，并对未来技术发展趋势做一些初步探讨。报告人简介：戴巍，中国科...
详情 -
2025.12.19
Disk Population Synthesis of structured disks with external photoevaporation
With the ever-increasing census of protoplanetary disks observed in mm emission, disk population synthesis studies have become an important tool to constrain expected disk properties and the occurrence of sub-structures. Previous studies have revealed that the observed spectral indices are consistent with ubiquitous substructures emerging at early times. However, it still remains challenging to...
详情 -
2025.12.19
The 60 years of cosmic microwave background radiation (1965-2025): where new physics may emerge?
The measurements of the cosmic microwave background radiation is the pillar of modern precision cosmology. In this talk, I will give a brief overview of the experimental evolution of the cosmic microwave background radiation and highlight its phenomenal success and distinctive challenges. I will also discuss the current outstanding questions in modern cosmology and the prospects of the emergenc...
详情 -
2025.12.15
Connecting the Dots: From Electrons to Planets
Most exoplanets likely begin life wrapped in hydrogen–helium envelopes that interact intensely with their molten or supercritical interiors for millions to billions of years. Yet, despite their pivotal role in shaping planetary formation, evolution, and atmospheric composition, our fundamental physical and chemical understanding of these interactions remains limited, in large part because they...
详情 -
2025.12.08
Particle acceleration and emission in jets of microquasars and active galactic nuclei
The origin of cosmic rays (CRs) remains an open question. The CR spectrum is characterized by two significant breaks: the knee at ~3 PeV (PeV=1e15 eV) and the ankle at ~3 EeV (EeV=1e18 eV). It is widely accepted that ultra-high-energy cosmic rays (UHECRs) above the ankle originate from extragalactic sources, with the transition energy between galactic and extragalactic components lying between ...
详情 -
2025.12.03
The use of the quasar dataset on Cosmology: consequences and prospects
We try to find an optimized methodology to constrain the cosmological parameters using the quasar dataset. Quasars can be the potential cosmic probe that can fill up the gap between the farthest observed Type Ia Supernovae and the Cosmic Microwave Background CMB. Quasars can be observed to the highest redshift of z ≈ 7.1. It can give valuable insight into the tensions of the cosmological param...
详情