UNCOVER: Candidate Red Active Galactic Nuclei at 3 < z < 7 with JWST and ALMA

Abstract The James Webb Space Telescope (JWST) is revolutionizing our knowledge of z > 5 galaxies and their actively accreting black holes. Using the JWST Cycle 1 Treasury program Ultradeep NIRSpec and NIRCam Observations before the Epoch of Reionization (UNCOVER) in the lensing field A2744, we report the identification of a sample of little red dots at 3 < z phot < 7 that likely contain highly reddened accreting supermassive black holes. Using a NIRCam-only selection to F444W < 27.7 mag, we find 26 sources over the ∼45 arcmin 2 field that are blue in F115W − F200W ∼ 0 (or β UV ∼ –2.0 for f λ ∝ λ β ), red in F200W − F444W = 1−4 ( β opt ∼ +2.0), and are dominated by a point-source-like central…

• NS
  National Science Foundation

  Awards: 2109066, 2020750
• NA
  National Aeronautics and Space Administration

  Awards: NAS5-26555, HST-HF2-51515.001-A
• ST
  Space Telescope Science Institute

  Awards: NAS5-26555, 26555, HST-HF2-51515.001-A
• NR
  National Radio Astronomy Observatory
• EC
  European Commission
• NR
  National Research Foundation
• SN
  Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

  Awards: 26555, 200020_207349
• RG
  Rijksuniversiteit Groningen
• DG
  Danmarks Grundforskningsfond
• US
  United States-Israel Binational Science Foundation

  Awards: 2109066, 2020750
• NO
  Nederlandse Organisatie voor Wetenschappelijk Onderzoek

  Awards: 2020750, 2109066, 016.VIDI.189.162
• KA
  Korea Astronomy and Space Science Institute

  Award: 016.VIDI.189.162
• NA
  National Astronomical Observatory of Japan
• NI
  National Institutes of Natural Sciences
• SF
  Staatssekretariat für Bildung, Forschung und Innovation