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2026.10.14
Stellar Feedback across Scales: Connecting Star Formation, Gas Dynamics, and Galaxy Evolution
Stellar feedback regulates star formation and shapes the interstellar medium, making it central to understanding galaxy evolution. Advances in observing facilities and data analysis offer new opportunities to quantify its effects across scales and environments. Using FAST and VLA observations of Andromeda, we trace supernova energy input through expanding superbubbles and demonstrate that this ...
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2026.12.24
Renxin Xu's talk
Host: Wei Cu
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2026.12.17
Nucleosynthesis and relativistic jet formation in neutron-star mergers and stellar collapse
Despite decades of progress, both observational and theoretical, understanding the nature of the 'central engine(s)' of both short and long gamma-ray bursts (GRBs)---the physical processes that give rise to their relativistic jets---remains an open problem. Similarly, the astrophysical origin of about half of the elements heavier than iron---those synthesized via rapid neutron capture (the r-pr...
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2026.12.10
Longlong Feng's talk
Host: Cheng Zha
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2026.12.03
Xuelei Chen's talk
Host: Yi Ma
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2026.11.26
Enwei Liang's talk
Host: Di L
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2026.11.19
The mystery of strong nitrogen emissions across cosmic time and the formation of super star clusters
Nitrogen emitters are an emerging population of galaxies whose nebular spectra show surprisingly strong emission lines from ionized nitrogen, which requires dramatically elevated gas-phase nitrogen abundance than in typical ISM of comparable metallicity. The emission is almost always associated with highly pressurized ionized gas and extremely young stellar populations, and exhibit spatial stra...
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2026.11.12
The Transiting Exoplanet Survey Satellite and a Sky Full of New Worlds
The Transiting Exoplanet Survey Satellite (TESS) is a NASA mission launched in 2018 to search nearly the entire sky for planets transiting bright, nearby stars. With four small wide-field cameras, TESS has enabled the discovery of more than 1,000 planets, with thousands of additional candidates awaiting further investigation. The host stars of TESS planets are remarkably diverse, spanning much ...
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2026.11.05
From a wandering massive black hole to the Hubble constant with 3-D spectroscopy
Three-dimensional spectroscopy—two spatial dimensions plus one spectral dimension—has transformed our ability to explore the Universe at optical wavelengths. Taking advantage of this technique, we have carried out two large observing programs: the Dwarf Galaxy Integral-field Survey (DGIS) and the Westlake Integral-field Survey for H0 (WISH). In this talk, I will first discuss the discovery of...
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2026.10.29
Cosmological simulations of galaxy formation
Hydrodynamical simulations of galaxy formation have become a central tool in extragalactic astronomy and cosmology. They underpin the interpretation of observations of galaxy evolution and provide predictions for cosmological surveys. I will discuss why their realism has improved dramatically in recent years, and where the main challenges remain. I will then introduce COLIBRE, a new suite of si...
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