I am a PhD candidate working on intergalactic medium (IGM) and cosmic reionization with Prof. George Becker at University of California, Riverside.
You can find my CV here. Currently, I am learning when and how the neutral hydrogen gas filling between galaxies became ionized around one billion years after the Big Bang using Keck and VLT.
photo: © ESO/ John Colosimo
Reionization is one of the most important "phase transitions" in the history of our Universe. Revealing when and how reionization occurred is essential to the understanding of dark matter, the formation and evolution of the first stars and galaxies, as well as super massive black holes. Large-scale fluctuations in intergalactic Lyman-$\alpha$ opacity at $z \leq 6$ suggest that reionization may have ended later than is normally assumed. Alternatively, this can be explained by a post-reionization fluctuating UV background. Now I am trying to use spectra of high-redshift QSOs to probe the IGM along the lines of sight and distinguish these models (Zhu et al. in prep).
COVID-19 (need a vaccine?) doesn't prevent us from looking up at the beautiful sky! UCR Astronomy and Riverside Astronomical Society are holding a monthly virtual stargazing event. I am honored to be a volunteer to help increase the accessibility of science for the gerneral public during the pandemic.
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