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2025.12.25
Shuo Xiao's Talk
Host: Di L
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2025.12.18
Bin Ren's Talk
Host: Wei Zh
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2025.12.11
Xinmin Zhang's Talk
Host: Cheng Zha
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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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2025.10.30
Seeing the Missing Worlds Using CMB as a Backlight 宇宙微光中的隐匿世界
During the 14 billion year journey from the last scattering surface to the Earth, cosmic microwave background (CMB) photons were deflected (CMB lensing), stretched (the ISW effect) and scattered (the Sunyaev Zel’dovich effect and patchy screening). The induced secondary CMB anisotropies contain invaluable information on missing baryons, dark matter, dark energy, gravity, and the origin mechani...
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2025.10.23
Metal transport in the interstellar and circumgalactic medium
Observations over the past decade have revealed that galaxies lose many of the metals they produce to the circumgalactic medium, and that the metals they retain are arranged in complex patterns that go beyond simple radial gradients. Theoretical models for how metals move through and out of the interstellar medium to produce these distributions are still in their infancy. In this talk, I discus...
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2025.10.16
Introduction of Muztag-Ata 1.93meter Synergy Telescope and Time-Delay Cosmography
Muztag-Ata 1.93meter Synergy Telescope is general Optical telescope located at Pamir Plateau with Altitude of 4500m.It is constructed by Beijing Normal University, Xinjiang Observatory of CAS, Nanjing Institute of Astronomical Optics & Technology and Xinjiang University.Its instrumentation includes a three-color simultaneous photometer and a double spectrograph.It is a perfect telescope for tim...
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