科学研究
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2023.07.03
Deconstruction of galaxies: bulges, disks, and stellar halos --- insights from the IllustrisTNG Simulations
In this project, we aim to understand structures in galaxies from a deconstructive perspective. In a series of papers, we have developed an accurate, efficient, and unsupervised way that extracts structures of simulated galaxies in kinematics. We successfully identify kinematically-derived bulge, disk, and halo structures that have clear physical formation mechanisms in the IllustrisTNG simulat...
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2023.07.03
Modelling the formation and evolution of galaxies through semi-analytic spectral fitting
Obtaining physical information from the integral spectra of unresolved stellar populations is the key to investigating a galaxy's evolution, during which modelling the levels of heavy elements within the galaxy over time is fundamental but often missed. While most studies of chemical evolution tend to focus on gas and stellar metallicities separately, these quantities can – and should – be tr...
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2023.07.03
Structural evolution of galaxies since cosmic noon
In this talk I will discuss the geometry, structure and morphological transformation of star-forming and quiescent galaxies from the peak of cosmic star formation to the present day. Resolved observations from multiple wavelengths and tracers enable us to reconstruct where stars form within galaxies and how stellar distributions are assembled, while simultaneously revealing insights into the e...
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2023.06.30
Revealing the Recycled inflow of the massive galaxies at high redshift
The gas surrounding galaxies is known as the circumgalactic medium (CGM) which is considered to be deeply coupled with the evolution of galaxies. Although lots of works have been done, how galaxies co-evolve with the CGM is still poorly understood. To explore the CGM-galaxy ecosystem, especially the baryon cycle, we conduct observations on the high redshift CGM. First, we study the gas surroun...
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2023.06.29
Adaptive Optics Facility and MUSE at the VLT-UT4
In this talk, I will present the Adaptive Optics Facility (AOF) and the MUSE instrument at VLT/UT4. AOF is the new generation cutting-edge adaptive optics system for the instruments at UT4. With the high-performance deformable secondary mirror and 4 laser guide stars system, AOF enables to correct atmospheric turbulence effects on the optical wavelength, facilitating the Multi-Unit Spectrosco...
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