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2026.01.08
A New Era in Extragalactic Astrophysics with JWST NIRCam Wide Field Slitless Spectroscopy
The James Webb Space Telescope (JWST) has transformed our view of galaxy formation in the early Universe. One of its most powerful capabilities is NIRCam wide-field slitless spectroscopy (WFSS). Originally designed as an engineering mode, NIRCam WFSS has evolved into a discovery machine that delivers tens of thousands of spectroscopic redshifts from z=0 to 9. This provides a highly complete and...
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2026.01.05
An X-ray View of Active Galactic Nuclei
Active galactic nuclei (AGN) are powered by accretion onto supermassive black holes (SMBHs) and play a central role in galaxy evolution by tracing SMBH growth across cosmic time. As some of the most luminous objects in the Universe, AGN provide unique laboratories for studying accretion physics and relativistic processes in extreme environments. However, the extremely small physical scales of t...
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2025.11.27
Icy ocean worlds -- from the surface to the interior
Icy moon oceans are promising targets in the search for extraterrestrial life, but characterizing their internal dynamics remains challenging, as most oceanic processes are obscured from direct observation by the overlying ice shell. In contrast, the ice shell itself is relatively accessible to observation and may serve as a window into the ocean below. As the only liquid layer in the system, t...
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2025.12.25
从高能暂现源的观测、研究到应用
近年来，多个历史性多波段成协事件的观测为高能暂现源的研究提供了重要突破。例如，GRB 170817A与引力波信号的成协，不仅证实了双致密星并合事件，还为引力波天文学的发展奠定了基础。XRB 200428与快速射电暴的成协揭示了磁星是部分FRB的起源。这些重要事件的成协证认及后续的数据分析和科学研究，首先依赖于对其准确定位，因此我们提出了改进的多卫星联合定位方法。我们还对这些爆发进行了准周期、谱延迟、最小光变时标、引力...
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2025.12.18
Coronagraphs: From Proving Einstein to Imaging Exoplanetary/Extragalactic Systems
Thirty years after the discovery of an exoplanet orbiting a Sun-like star, we have confirmed over 6,000 exoplanets. However, the existence of a Solar System analog – let alone an exo-Earth – remains elusive. This gap in our knowledge reflects not the uniqueness of our home, but the technical challenge of directly detecting habitable worlds around Sun-like stars. High-contrast imaging, enabled...
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2025.12.11
动力学暗能量与原初引力波探测新进展
本报告将介绍国际暗能量研究的最新进展，介绍暗能量理论模型，特别是描述状态方程越过 宇宙学常数线的Quintom 理论的发展历史和研究现状; 介绍我国阿里原初引力波探测实验（AliCPT）的现状和下一步规划及预期科学目标; 介绍AliCPT 探测暗能量动力学机制的可能性。报告人简介张新民 研究员，阿里原初引力波探测实验首席科学家/AliCPT国际合作组发言人。1991年美国洛杉矶加州大学（UCLA）研究生毕业获博士学位，1996年回国在高能...
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2025.12.04
Where do giant planets originate from?
The detection of the first hot Jupiter around a main sequence star 30 years ago has opened the question about the origin of these planets. Considering that these planets accrete their gaseous envelope in the protoplanetary disc they are born in, it makes sense to relate the formation location of these planets to the chemical composition of the disc. In particular, the idea to related the atmosp...
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2025.11.20
Little Red Dots: A New Laboratory for Black Hole and Galaxy Formation
The discovery of the "little red dots" (LRDs) with the James Webb Space Telescope has revealed a host of surprises about this mysterious class of high-redshift objects. Their physical nature remains hotly contested. I will argue that LRDs trace the initial phase of supermassive black holes that predates the formation of their host galaxies. As such, they offer a uniquely valuable laboratory to ...
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2025.11.13
Unveiling the Dynamic Heart of M87: Structural Variations Across Multiple Scales
M87, the nearest radio galaxy hosting a supermassive black hole of six billion solar masses, offers a unique laboratory for probing black hole accretion and jet-launching mechanisms. Over the past two decades, high-resolution observations at multiple spatial scales have revealed striking structural variations in its jet and accretion system. By linking these variations across microarcsecond to ...
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2025.11.06
Quasi-Periodic Eruptions: observation, origin and applications
Quasi-periodic eruptions (QPEs) are intense repeating soft X-ray bursts with recurrence times about a few hours to a few weeks from galactic nuclei. More and more observations show that QPEs are associated with tidal disruption events (TDEs), especially TDEs in recently faded active galactic nucleis (AGNs). The intriguing timing pattern of QPEs indicates that (at least a fraction of) QPEs are t...
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