People

Professor Stephen Chi-Yung Ng is a high energy astrophysicist working on radio and x-ray studies of neutron stars, pulsar wind nebulae, and supernova remnants.

A massive star ends its life as a violent supernova explosion. The compact core left over could form a neutron star. Such stars are ultra-dense objects, with more massive than the Sun but a size smaller than a city. They rotate rapidly and possess the strongest magnetic field in the Universe. These remarkable properties make them ideal laboratories for studying physics under extreme conditions, such as ultra strong gravity and extreme electromagnetism, that can never be reproduced on Earth.

1. “Radio Study of the Pulsar Wind Nebula Powered by PSR B1706-44”, Liu, Y. H., Ng, C. Y., & Dodson, R., The Astrophysical Journal, 945(1), 82 (2023)

2. “High-resolution Radio Study of the Dragonfly Pulsar Wind Nebula Powered by PSR J2021+ 3651.”, Jin, R., Ng, C. Y., Roberts, M. S., & Li, K. L. The Astrophysical Journal, 942(2), 100. (2023)

3. “Magnetic Field Structure and Faraday Rotation of the Plerionic Supernova Remnant G21. 5–0.9.”, Lai, P. C., & Ng, C. Y. The Astrophysical Journal, 930(1), 1 (2022)

4. “High-frequency radio observations of two magnetars, PSR J1622− 4950 and 1E 1547.0− 5408”, Chu, C. Y., Ng, C. Y., Kong, A. K., & Chang, H. K., Monthly Notices of the Royal Astronomical Society, 503(1), 1214-1220 (2021)

5. “X-ray and Radio Variabilities of PSR J2032+ 4127 near Periastron.”, Ng, C. Y., Ho, W. C., Gotthelf, E. V., Halpern, J. P., Coe, M. J., Stappers, B. W., & Kerr, M, The Astrophysical Journal, 880(2), 147 (2019)

1. General Research Fund (GRF) 2023/24 (PI): Unveiling the Nature of PeVatron (HKU Project Code: 17301723)
2. General Research Fund (GRF) 2020 (PI): A search for Very High Energy emission from pulsars with HAWC (HKU Project Code: 17304920)
3. Environment and Conservation Fund 2022 (PI): Exploratory Study of the Impact of Artificial Light at Night on Birds at Mai Po Nature Reserve (HKU Project Code: ECF Project 113/2022)