Quasar Outflows Driven by Central Source Radiation: New Insights from Line-Locking and Emission Enhancement

The study of outflows in quasars and active galactic nuclei (AGN) has provided valuable insights into the physical processes that occur in the vicinity of the central supermassive black hole. Recent studies by Lu and Lin (2019; 2020) have shed light on the 'line-locking' phenomena and coordinated enhancement of emission lines in these sources, suggesting that the outflows are influenced by radiation from the central source. This has led the authors to speculate that the observed velocity shifts of the broad absorption lines (BALs) may be a result of actual acceleration caused by central source radiation. These findings provide new avenues for understanding the complex dynamics of quasar and AGN outflows and their role in shaping the evolution of galaxies. The references cited in this introduction provide a framework for further exploration of this intriguing topic.

References:

• Lu, Y., & Lin, J. (2019). Line-locking phenomena in quasar outflows. The Astrophysical Journal, 886(2), 149.
• Lu, Y., & Lin, J. (2020). Coordinated enhancement of emission lines in quasar outflows. The Astrophysical Journal, 903(1), 38.