Welcome to my website!

I like astronomy and find it interesting to learn about the laws of the universe.

You can download my CV here.

You can view a list of my publications here.

My name is Man Yin Leo Lee (Leo). I earned my Bachelor's degree in Physics from the University of Hong Kong (HKU) in 2021 and my Master of Philosophy in Physics from the Chinese University of Hong Kong (CUHK) in 2024. Currently, I am pursuing my doctoral degree at the University of California San Diego (UCSD).

My work primarily focuses on spectroscopic observation of the interstellar medium (ISM) and astronomical instrumentation. I used stacked spectra of MaNGA galaxies to measure the temperature of the ISM in quiescent galaxies. I also worked on building the fiber bundle of the AMASE spectrograph.

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Science

Ionization source of LIERs

The spectrum of the interstellar medium in quiescent galaxies is dominated by emission lines from low-ionization species. These regions are classified as Low Ionization Emission-line Regions (LIERs). The ionization mechanism behind these regions remains a lasting mystery. We aim to answer this question by measuring the temperature of these regions using spectroscopic data from SDSS MaNGA.

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Instrumentation

Fiber system development of AMASE

I was involved in the development of AMASE, an integral field spectrograph designed to study ionized gas in the Milky Way and nearby star-forming galaxies. My main focus was on developing the fiber system of the spectrograph, which involved fiber alignment, polishing, and insertion. I also characterized and examined multimode fibers with different core geometries.