# 2017.03.15
**Source**: https://astron.snu.ac.kr/en/date/2017/03/15/
**Parent**: https://astron.snu.ac.kr/en/
## [THE VARIABILITY TIME SCALE – ACCRETION RATE RELATION OF ACTIVE GALACTIC NUCLEI](https://astron.snu.ac.kr/en/16340/)
THE VARIABILITY TIME SCALE – ACCRETION RATE RELATION OF ACTIVE GALACTIC NUCLEI PhD stedent Jongho Park (first author) Prof. Sascha Trippe (Advisor/Corresponding author) Active galactic nuclei (AGN) are the strongest sources of energy in the universe, being up to 10,000 times brighter than our home galaxy, the Milky Way. Their […]