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2026.04.16

Atoms, Grains, Infinity: Consistent update the understandings of dust grain physics in diffuse matter astrophysics

Dust grains are fundamental constituents of diffuse matter throughout the universe, mediating key processes from interstellar chemistry to planet formation. Yet their microscopic behaviors, presumably governed by interactions at surfaces, has traditionally been treated through empirical and semi-quantitative prescriptions in most astrophysical models. In this report, we present a series of bott...

2026.04.09

Evolution of Globular Cluster Systems from High Redshift to the Present

Globular clusters are massive star clusters that formed in high-redshift galaxies and remained gravitationally bound until the present. They serve as tracers of most active episodes of galactic star formation and allow us to reconstruct the assembly history of the Milky Way and nearby galaxies. I will describe a long-term program to model the formation and disruption of globular clusters throug...

2026.04.02

一颗持续活跃的快速射电暴 A Persistently Active Repeating Fast Radio Burst

Fast Radio Bursts (FRBs) are millisecond-duration, high-energy radio transients of unknown origin, whose large dispersion measures indicate extragalactic, and possibly cosmological, distances. With the rapid advancement of radio telescope capabilities, the number of detected FRBs has increased dramatically, greatly advancing studies of their physical origins and cosmological applications. Howev...

2026.03.26

Gas cycling processes in nearby galaxies

Galaxies evolve via internal and external processes. Kinematically misaligned galaxies, primarily stemming from external gas acquisition, are ideal probes of this process. From final data release of MaNGA, we selected ~700 misaligned galaxies (gas-gas, gas-star, star-star) and systematically investigated their origin and physical properties. Key findings: (1) Misaligned gas, often perpendicular...

2026.03.19

Resolving small-scale dynamics of supermassive black holes in galaxy formation simulations

Supermassive black hole (SMBH) binaries, formed during galaxy mergers, are the primary targets for low-frequency gravitational wave (GW) observatories. Understanding the coalescence process of SMBH binaries in a cosmological galaxy formation context is crucial for accurate GW predictions. However, this has been a long-standing challenge: traditional galaxy formation simulations lack the force r...

2026.03.10

Cosmic Dance: Angular Momentum Transfer from Large-scale to Small-scale

Angular momentum is a key quantity linking the formation of galaxies to the dynamics of the cosmic web. Building on a series of recent observational and theoretical works, this talk will present a picture of how angular momentum is generated, transported and reprocessedacross scales—from megaparsec-scale filaments, through galaxy clusters, down to individual galaxies. I will first show how lar...

2026.03.09

Mapping 3D Interstellar Magnetic Fields in the Era of Wide-field Surveys

Magnetic fields play a fundamental role in regulating the evolution of interstellar medium and star formation in the Milky Way. However, a comprehensive picture of the 3-dimensional magnetic fields in the Galactic 3-dimensional interstellar space remains unavailable. Spectral-line polarization arising from the Zeeman effect and Goldreich-Kylafis effect probes magnetic fields with velocity infor...

2026.03.12

Uncovering dark matter distributions: from the Milky Way to nearby galaxies

Dark matter distribution in galaxies is a key to test the LCDM and galaxy formation models. We measure the dark-matter mass distribution for a representative sample of 140 nearby galaxies by combining IFU data from MaNGA and HI spectra from FAST. We find strong evidence that these galaxies exhibit a lower dark-matter densities in their inner regions than predicted by cosmological simulations in...

2026.03.02

An All-Sky 3D Extinction-Curve Map of the Milky Way: Insights into Interstellar Organics

I present the first three-dimensional (3D), full-sky dust map that reveals variations in the extinction curve, parameterized by R(V). Using Gaia XP spectra, we measure extinction curves for over 130 million stars—more than two orders of magnitude more than previously available—enabling us to trace dust properties across the Milky Way with unprecedented detail. Surprisingly, trends in this map...

2026.03.04

A Trapezium-like OB cluster in the making

The Trapezium Cluster in Orion teaches us that massive stars often form together in compact systems—but how such dense OB groupings are assembled remains an open question. In this talk, I will present high-resolution observations with the Atacama Large Millimeter/submillimeter Array (ALMA) that reveal an exceptionally young, deeply embedded massive quadruple OB system in the making. The four m...