articleThe Astrophysical JournalMar 1, 2024GOLD OA

UNCOVER Spectroscopy Confirms the Surprising Ubiquity of Active Galactic Nuclei in Red Sources at z > 5

JEJenny E. GreeneILIvo LabbéADAndy D. GouldingLJLukas J. FurtakICIryna Chemerynska

Princeton University · Swinburne University of Technology · +25 more institutions

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Abstract

Abstract The James Webb Space Telescope is revealing a new population of dust-reddened broad-line active galactic nuclei (AGN) at redshifts z ≳ 5. Here we present deep NIRSpec/Prism spectroscopy from the Cycle 1 Treasury program Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (UNCOVER) of 15 AGN candidates selected to be compact, with red continua in the rest-frame optical but with blue slopes in the UV. From NIRCam photometry alone, they could have been dominated by dusty star formation or an AGN. Here we show that the majority of the compact red sources in UNCOVER are dust-reddened AGN: 60% show definitive evidence for broad-line H α with a FWHM > 2000 km s −1 , 20% of the…

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Topics & keywords

Topics
Keywords
  • Physics
  • Astrophysics
  • Reionization
  • Active galactic nucleus
  • Astronomy
  • Galaxy
  • Photometry (optics)
  • Redshift
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