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Our group specializes in observational astrophysics, with a primary focus on phenomena occurring in regions of extreme gravity near cosmic black holes. Our specific research topics include (1) the physics of accretion and outflow processes in the vicinity of black holes, (2) the generation of TeV-PeV scale high-energy neutrinos and their correlation with radio to gamma-ray flares near black holes, and (3) the formation and evolution of massive black holes in the early Universe, including the possible role of direct collapse and the emergence of intermediate-mass black holes during the formation of the first stars and galaxies in the Universe. Recently, we have also expanded our work to include studies of dark matter and other cosmological phenomena.
To this end, our research group employs multi-wavelength and multi-messenger observations of the Universe, collecting and utilizing data from both ground- and space-based observatories. More specifically, we perform nano-radian scale extreme-resolution imaging of cosmic black holes using radio interferometry and aperture synthesis techniques, as well as time-series and spectral modeling across various wavelengths. We also collaborate actively with large-scale international consortia, including the Event Horizon Telescope (EHT) Collaboration. In addition, we also contribute to the design and verification of next-generation ground-based and space-borne observational facilities. Our group is also engaged in developing advanced big data processing tools and AI-based methods for future exabyte-scale data processing, particularly in support of the Square Kilometre Array (SKA).
Keywords: black holes, General Relativity, high-energy neutrinos, multi-messenger astrophysics, early Universe and cosmology, radio astronomy, radio interferometry, space and lunar telescopes, machine learning and neural networks, exascale computing
Major research field
Black holes, active galaxies, accretion and outflow, multi-wavelength/messenger astrophysics
Desired field of research
Cosmology, radiative transfer, neutrino physics, MHD/GRMHD simulations, machine learning, FPGA/GPU, RF engineering
Research Keywords and Topics
Black holes, General Relativity, high-energy neutrinos, multi-messenger astrophysics, early Universe and cosmology, radio astronomy, radio interferometry, space and lunar telescopes, machine learning and neural networks, exascale computing
Research Publications
· “The dynamics of the parsec-scale jet in the neutrino blazar PKS 0735+178”, Yu-Sik Kim & Jae-Young Kim*, 2025, Astronomy and Astrophysics, 699, 381
· "A ring-like accretion structure in M87 connecting its black hole and jet", Ru-Sen Lu et al. (with Jae-Young Kim), 2023, Nature, 616, 686
· "Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution", Jae-Young Kim* et al., 2020, Astronomy and Astrophysics, 640, 69
국가과학기술표준분류
- ND. 지구과학(지구/대기/해양/천문)
- ND12. 천문학
- ND1206. 외부은하/관측우주론
국가기술지도분류
- 기타 분야
- 060000. 국가기술지도(NTRM) 99개 핵심기술 분류에 속하지 않는 기타 연구
녹색기술분류
- 녹색기술관련 과제 아님
- 녹색기술관련 과제 아님
- 999. 녹색기술 관련과제 아님
6T분류
- 기타 분야
- 기타 분야
- 070000. 위의 미래유망신기술(6T) 103개 세분류에 속하지 않는 기타 연구