Room 531, CYM Physics Building, The University of Hong Kong, Pokfulam Road, Hong Kong
Current Research
Astronomy and Astrophysics Group: Observational Astrophysics - Star Formation and Cooling Flows in Galaxy Clusters
Dr. Lim's research has spanned a broad range of topics, including (i) stellar coronal magnetic activity, (ii) the formation and late evolution of stars in our Galaxy, (iii) star formation and AGNs in nearby galaxies, (iv) X-ray cooling flows in galaxy clusters, and (v) astrophysical applications of gravitational lensing, including weighing supermassive black holes, studying young galaxies, as well as the nature of dark matter. The present focus of his work is on topics (iii)-(v). As an observational astronomer, Dr. Lim uses primarily radio telescopes (e.g., VLA, SMA, ALMA) and optical-infrared telescopes (e.g., CFHT, HST). Dr. Lim has mentored many graduate students, a number of whom have gone on to PhD programs in the USA and Europe, or have since become postdoctoral fellows. He collaborates with many astronomers worldwide, bringing international exposure to his students. Over the past 5 years, in collaboration with Prof. Thomas Broadhurst at Ikerbasque, Spain, Dr. Lim has built a strong group of undergraduate and graduate students working on gravitational lensing at HKU. Dr. Lim actively recruits talented undergraduate students for casual research in preparation for their capstone and graduate studies.
Research Interest
Astrophysics
Star Formation
Stellar Activities
Evolved Stars
External Galaxies
Radio Interferometry
Representative Publications
"A likely Supermassive Black Hole revealed by its Einstein radius in Hubble Frontier Field Image," Chen, M. C., Broadhurst, T., Lim, J., Diego, J. M., Ohyama, Y., Ford, H., & Benítez, N, The Astrophysical Journal, in press (2018)
"Magnification Bias of distant Galaxies in the Hubble Frontier Fields: Testing Wave vs. Particle Dark Matter predictions," Leung, E., Broadhurst, T., Lim, J., Diego, J. M., Chiueh, T., Schive, H.-Y., & Windhorst, R., The Astrophysical Journal, in press (2018)
"Geometric Corroboration of the Earliest Lensed Galaxy at z ≃ 10.8 from Robust Free-form Modelling," Chan, B. Y. M., Broadhurst, T., Lim, J., Diego, J. M., Zitrin, A., Coe, D., & Ford, H., The Astrophysical Journal, 835, 44 (2017)
"The Role of Electron Excitation and Nature of Molecular Gas in Cluster Central Elliptical Galaxies," Lim, J., Dinh-V-T., Vrtilek, J., David, L. P., & Forman, W., The Astrophysical Journal, 850, 31 (2017)
“The High-Velocity System: Infall of a Giant Low-Surface-Brightness Galaxy towards the center of the Perseus Cluster”, A. Yu, J. Lim, Y. Ohyama, J. C. C. Chan, & T. Broadhurst, The Astrophysical Journal, 814, 101 (2015)
“A Rigorous Free-form Lens Model of A2744 to Meet the Hubble Frontier Fields Challenge”, D. Lam, T. Broadhurst, J.M. Diego, J.J.L. Lim, D. Coe, H.C. Ford and Z. Wei, The Astrophysical Journal, 697, 98 (2014)
“Molecular Gas in the X-Ray Bright Group NGC 5044 as Revealed by ALMA”, L.P. David, J.J.L. Lim, et al., The Astrophysical Journal, 792, 94 (2014)
"A Molecular Hydrogen Nebula in the Central cD Galaxy of the Perseus Cluster", J.J.L. Lim, Y. Ohyama, C.H. Yan, D.V. Trung and S.Y. Wang, The Astrophysical Journal, 744, 112 (2012)
