Gemini Near-infrared Spectroscopy of High-Redshift Fermi Blazars: Jetted Black Holes in the Early Universe Were Overly Massive

Colin J. Burke, Xin Liu, Yue Shen

Jetted active galactic nuclei (AGNs) are the principal extragalactic $\gamma$-ray sources. Fermi-detected high-redshift ($z>3$) blazars are jetted AGNs thought to be powered by massive,…