Research
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2024.02.23
Galaxy-halo connection and near-field cosmology with numerical and semi-analytic methods
In our modern understanding of the Universe, dark matter (DM) constitutes ~85% of the total mass and forms gravitationally bound halos which are the sites for galaxy formation. Galaxies contain information of their host halos, and halos react to the baryonic processes of the inhabitant galaxies — their connections are essential for understanding galaxy formation, and enable us to derive fundam...
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2023.12.26
Deciphering Galaxy Quenching: Insights from the Multiphase Circumgalactic Medium
In the galactic ecosystem, the circumgalactic medium (CGM) is a massive baryon reservoir orchestrating baryonic inflows and outflows, shaping galaxy formation and evolution. Of profound significance is the quenching of cosmic star formation since cosmic noon, pivotal in unraveling present-day galaxy characteristics, yet its driving force remains uncertain. Characterizing and modeling the CGM em...
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2023.12.26
Witnessing the Birth of Planets: The Structure and Chemistry of Planet-Forming Disks
To date, there are more than 5000 exoplanets discovered in our neighborhood, showcasing a remarkable diversity in planetary system architectures. Unraveling the planet formation process, as well as the origin of this diversity, requires a comprehensive understanding of their birth sites - the dusty and gas-rich disks orbiting around young stars. ALMA’s unprecedented spatial resolution and sens...
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2023.12.26
The lively radio transient sky
Making use of exponential increases in computing power, radio astronomers have been able to search larger areas of the sky at high time and frequency resolution. These surveys facilitate the studies of radio transients, particularly contributing to the thriving investigation of fast radio bursts (FRBs), enigmatic radio bursts observable at cosmological distances. I will provide an overview of t...
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2023.10.23
Exploring the early Milky Way with metal-poor stars
Old low-metallicity (“metal-poor”) stars provide us a unique window to explore the early evolution and formation of our Milky Way as well as the early nucleosynthesis in the universe. In this talk, I would like to introduce the art of Galactic archaeology with metal-poor stars, mainly using the joint efforts between LAMOST and Subaru in the past few years as an example. A homogeneous high-pre...
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