Research
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2022.11.10
Space-based Wide-field Slitless Spectroscopy and Near-Ultraviolet Imaging
In this talk, the speaker will briefly review the observing modes of wide-field slitless spectroscopy and near-ultraviolet (NUV) imaging, enabled by the cutting-edge instruments on board current space telescopes, i.e. the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST). He will first introduce the multiple observing programs that acquired deep near-infrared grism and NUV ...
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2022.11.03
"brown dwarfs, are we stupid or you are just different?"
Brown dwarfs are the latest discovered population on the HR diagram. They formed like stars but appearing like gaseous planets, thus bridging the gap between stars and planets. I will briefly introduce the research history of brown dwarfs and summarize the properties of known brown dwarfs. Then, I will explain the new discovered substellar transition zone formed by transitional brown dwarfs, an...
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2022.10.27
Towards precise calibrations of wide-field surveys in the era of LAMOST and Gaia
Uniform and precise calibration plays an important role in the current and next-generation surveys. In this talk, I will discuss challenges and opportunities of 1) photometric calibration of wide-field photometric surveys, 2) wavelength calibration of spectroscopic surveys, and 3) flux calibration of slitless spectroscopic surveys in the era of LAMOST and Gaia.BIO2015-Present: Associated Profe...
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2022.10.20
Multi-faceted Views of Planetary Systems
Over the past couple decades, thousands of extra-solar planets have been discovered orbiting other stars. The exoplanets discovered to date exhibit a wide variety of orbital and compositional properties; most are dramatically different from the planets in our own Solar System. Our classical theories for the origins of planetary systems fail to account for the diversity of planets now known. In ...
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2022.10.13
Cosmology with Massive Neutrinos
Ghostly neutrino particles continue to bring surprises to fundamental physics, from their existence to the phenomenon of neutrino oscillation, which implies their nonzero masses. Their exact masses, among the most curious unknowns beyond the Standard Model of particle physics, can soon be probed by the joint analysis of upcoming cosmological surveys including the CSST, Rubin Observatory LSST, P...
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