科学研究
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2025.05.16
从小尺度到宇宙大尺度探索超弥散星系的形成机制 Unveiling the Formation Mechanisms of Ultra-Diffuse Galaxies: From Small Scale to Large Scale
Ultra-Diffuse Galaxies (UDGs) represent an extraordinary class of galaxies with effective radii comparable to the Milky Way yet stellar masses only 1/100 to 1/1000 of our Galaxy. Found in a variety of cosmic environments—from galaxy clusters and groups to large-scale filaments and cosmic voids—their origins remain a subject of intense debate, positioning them at the forefront of extragalactic...
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2025.05.14
Non-thermal pressure in galaxy clusters: methods, models, constraints
I will discuss the role of non-thermal pressure support as a major source of the difference between the hydrostatic and the total ``true'' halo mass in galaxy clusters. I will present new models and methods to constrain the non-thermal pressure, highlighting the role of the next generation of X-ray observatories, like XRISM and NewAthena, in constructing a consistent picture of the formation an...
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2025.05.07
Metallicity Correlations in Galaxies
Integrated field unit (IFU) spectroscopy provides a unique window to explore gas-phase oxygen abundances in the interstellar medium (ISM) of galaxies in the local Universe. Two-point correlations are one of the next-generation methodologies proposed to extract new information on ISM diffusion from metal fields inside galaxies. I will present two-point correlation analyses using CALIFA and MUSE ...
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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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2025.04.22
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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