UNCOVER: The growth of the first massive black holes from JWST/NIRSpec -- spectroscopic redshift confirmation of an X-ray luminous AGN at z=10.1

Understand

The James Webb Space Telescope is now detecting early black holes (BHs) as they transition from "seeds" to supermassive BHs.

• Recently Bogdan et al.
• (2023) reported the detection of an X-ray luminous supermassive BH, UHZ-1, with a photometric redshift at $z > 10$.
• Such an extreme source at this very high redshift provides new insights on seeding and growth models for BHs given the short time available for formation and growth.