세종대학교 두드림 비교과통합관리시스템

물리천문학과 콜로퀴움

‧강연 제목 :  Exploring the Origin of Relativistic Jets, High Energy Emission, and Neutrinos from Supermassive Black Holes

‧연사 : 경북대학교 김재영 교수님 

‧일시 : 2024년 4월 24일 (수요일) 17:00~18:30

‧진행 방법 : 영실관 601호

‧신청 가능 대상 : 세종대학교 재학생 누구나

‧신청기간 : 4월 22일 ~ 4월 24일

‧강의 초록

Certain fractions of active galactic nuclei (AGNs) show structured relativistic jets, both on small (< milli-pc) and large (> Mpc) spatial scales. Also, jetted SMBHs produce rapidly time-variable high-energy photons and particles such as neutrinos. Theoretical models suggest that mass accretion onto the central supermassive black holes (SMBHs) is the ultimate source powering these phenomena. However, detailed physical mechanisms responsible for determining the physical properties near the black holes, the onset of relativistic jets, and the acceleration and composition of particles in the outflow remain elusive yet. In this talk, I will review the current models of jetted SMBHs, key observational evidence, and several outstanding issues. I will then present our ongoing research, focusing on ultra-high resolution, time-domain, and polarimetric radio observations of various radio-bright and radio-faint AGNs, also combining multi-wavelength/messenger data. Also, I will briefly introduce forthcoming observing facilities such as the eKVN, next-generation EHT, and the Square Kilometer Array (SKA), which can foster further collaborative research.