Research
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2023.02.24
The variation of the stellar initial mass function (IMF) with metallicity and time
The stellar IMF is one of the most important astrophysical distributions and plays vital role in galactic astronomy. Both constant and variable IMFs across different environments have been claimed despite a large number of theoretical and observational efforts. However, the measurement of the IMF in Galactic stellar populations has been limited by the relatively small number of photometrically ...
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2023.02.14
Solar-like Oscillations: Past, Present, & Future
The analysis and interpretation of stellar oscillations ---asteroseismology --- permits direct observational examination of stellar interiors. In particular, low-degree p-modes, excited through the same stochastic convective mechanism as in our Sun, permit us to draw inferences about the global properties, interior structures, rotational dynamics, and evolutionary fates of field stars. Space-ba...
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2022.12.23
Cosmology with 3D maps of the Universe
The spatial clustering of large-scale structures (LSS) offers insights into the expansion history of the Universe and the growth of structures, and are foreseen to tackle the mysteries of the dark energy and dark matter. Precise cosmological constraints with clustering measurements require the 3-D positions (2-D angular position and redshift) of numerous tracers, and a large sample volume. To t...
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2022.12.23
Universe seen through weak gravitational lensing
We are facing an exciting era of discovering the nature of dark matter and dark energy with upcoming large-scale surveys, such as Chinese Survey Space Telescope (CSST), Rubin, and Euclid. One of the major analysis methods of the surveys, weak lensing (WL), uses the shape distortion of background sources for detecting the foreground matter distribution. It is a powerful method for studying dark ...
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2022.12.23
Mapping Interstellar Magnetic Field Strength in the Era of FAST, FASTA, and SKA
Magnetic field is one of the most important physical quantities regulating the evolution of interstellar medium and star formation in the Milky Way. Despite enormous surveys using techniques of dust polarization, Faraday rotation, and synchrotron polarization to reveal the magnetic field structure of the Milky Way, none of the techniques can give accurate magnetic field strength. Zeeman effect ...
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