Research
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2025.04.28
eROSITA Survey of the Hot Gaseous Halo of the Member Galaxies in Virgo
The X-ray-emitting hot gas is one of the primary components of the X-ray emission in normal galaxies and is crucial for understanding the evolution of the galactic ecosystem. The Virgo Cluster is the nearest and a rich galaxy cluster at its early evolutionary stage, which offers a great opportunity to study the hot gas content of its member galaxies and the cluster environmental effects. In thi...
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2025.04.24
Active galactic nuclei and mergers in IR-bright galaxies
The interaction of galaxies is known to regulate the star-formation activities in the merging systems, or galaxy pairs, however, whether and how such interactions affect the central supermassive black hole, often manifested as active galactic nuclei---AGNs, is still under debate. Controversies exist as to whether AGN activities are enhanced or suppressed during the different merging phases. The...
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2025.04.22
Shedding light on the particle nature of dark matter
Several astrophysical and cosmological phenomena are consistent with the existence of a non-luminous, non-interacting “Dark Matter.” In this talk I describe efforts to detect Cold Dark Matter with particle experiments and the current limits. I then give an overview of the astrophysical constraints on Warm, Self-Interacting, and Fuzzy Dark Matter and a future outlook on Dark Matter searches.BI...
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2025.04.21
Clustering analysis on 4MOST Cosmology Redshift survey
This presentation is divided into three main parts:Overview of Large-Scale Structure (LSS) Studies in CosmologyThis section introduces the theoretical framework behind the formation and evolution of large-scale structure, observations on LSS, statistical techniques used for LSS data analysis, and key phenomena (BAO, RSD and AP effect) associated with LSS.Introduction to 4MOST and the Cosmologic...
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2025.04.17
Wave dark matter
We will discuss the possibility that dark matter is composed of sufficiently light particles (such as axions) that it effectively behaves as a collection of waves. We will review the particle physics motivations and the rich wave phenomenology, and discuss the implications for astronomical observations and experimental detection.BIOHui Lam got his PhD from Massachusetts Institute of Technology....
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