Professor NG, Stephen Chi Yung

Current Research

• Astronomy and Astrophysics Group: Observational Astrophysics

  • Dr. Ng studies extreme objects in our Galaxy, including magnetars, energetic pulsars, pulsar wind nebulae (PWNe), and supernova remnants. He has led observational projects using world-class telescopes in X-rays and radio, such as the Chandra X-ray Observatory, XMM-Newton, the Expanded Very Large Array, and the Australia Telescope Compact Array. He has identified a pulsar moving at an enormous velocity over 2,000 km/s. He has also developed a powerful 3D modeling technique to capture the X-ray torus and jet morphology of PWNe and to measure the structure and evolution of the supernova remnant 1987A.

    Dr. Ng's latest research focuses on the magnetic fields of neutron stars and their environments. Employing X-ray observations, he measures the surface temperature of magnetars, which are stars with the strongest magnetic fields in the Universe, to understand their extreme properties and their connection with ordinary radio pulsars. In addition, he maps the magnetic field configurations of PWNe using radio telescopes, in order to probe the cosmic ray production and transport in these systems. Further information can be found at the webpage .

Research Interest

• Radio and X-ray Observations of Neutron Stars

• Pulsar Wind Nebulae

• Supernova Remnants

Representative Publications

• "Chandra Phase-Resolved Spectroscopy of the High-Magnetic-Field Pulsar B1509-58", Chin-Ping Hu, C.-Y. Ng, J. Takata, R. M. Shannon, and S. Johnston, the Astrophysical Journal, 838, 156 (2017)
• “Discovery of a Synchrotron Bubble Associated with PSR J1015-5719”, C.-Y. Ng, R. Bandiera, R. W. Hunstead, and S. Johnston, the Astrophysical Journal, 842, 100 (2017)
• "Radio Polarization Observations of the Snail: A Crushed Pulsar Wind Nebula in G327.1-1.1 with a Highly Ordered Magnetic Field",Y. K. Ma, C.-Y. Ng, N. Bucciantini, P. O. Slane, B. M. Gaensler, & T. Temim, The Astrophysical Journal, 820, 100 (2016)
• "Hunting for Orphaned Central Compact Objects among Radio Pulsars", J. Luo, C.-Y. Ng, W. C. G. Ho, S. Bogdanov, V. M. Kaspi, & C. He, The Astrophysical Journal, 808, 130 (2015)
• "An anti-glitch in a magnetar", R.F. Archibald , S.C.Y. Ng, K.N. Gourgouliatos, D. Tsang, P. Scholz, A.P. Beardmore, N. Gehrels, J.A. Kennea, Nature, 497, 7451, 591-593 (2013)

Awards