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To overcome the high optical extinction, near-infrared observations are needed for probing the microlensing events toward the Galactic center. The 2015-2019 UKIRT microlensing survey toward the Galactic center is the first dedicated precursor near-infrared (NIR) survey for the Nancy Grace Roman Space Telescope. We here report our recent work on analyzing the UKIRT microlensing survey data, reaching l=b=0 degree. We detect 532 clear microlensing events, 426 possible microlensing events, and 28 possible anomalous events. Accounting for the detection efficiency, the NIR microlensing event rates are likely rising toward the Galactic center and higher than the optical event rates.
Associate Professor Ma Bo is from the School of Physics and Astronomy, Sun Yat-sen University. He received his undergraduate degree in Astronomy from Nanjing University and his PhD in Astronomy from the University of Florida. His main research interests include using the radial velocity method and transit method to detect exoplanets and studying the atmospheres of exoplanets. He is currently leading and participating in four research projects supported by the National Natural Science Foundation of China and the Key Research and Development Program of the Ministry of Science and Technology.