---
res:
  bibo_abstract:
  - One of the most surprising results of early James Webb Space Telescope (JWST)
    observations is the discovery of an abundance of red, compact, broad-line objects
    dubbed “little red dots” (LRDs) at z > 4. Their spatial density (∼10−4–10−5 cMpc−3)
    is 100 times more abundant than UV-selected quasars at that redshift if one extrapolates
    the quasar luminosity function (QLF) down to the LRD regime. However, whether
    LRDs dominate black hole accretion at quasar-like luminosities (Lbol ≳ 1045−46
    erg s−1) remains unanswered, as probing the bright end of the LRD luminosity function
    requires a much larger area than that which is able to be surveyed by JWST. In
    this work, we present our search for the brightest LRDs (K < 23.7) at 4.5 < z
    < 4.9 using wide-area multiwavelength imaging surveys from the near-UV to the
    infrared bands. With over 15 deg2 of sky coverage, we only identify one single
    LRD candidate at zphot ≈ 4.6, which translates into a spatial density of n(M5100
    < −23.5) ≈ 10−8 cMpc−3—this is nearly 10 times less abundant than the UV-selected
    quasars at similar optical luminosity. When combined with the LRD sample identified
    by JWST at the same redshift range, we find a sharp cutoff in the optical luminosity
    function at λL5100 ≈ 2.2 × 1044 erg s−1, while the quasar luminosity function
    (QLF) turnover occurs at ≳20 times higher luminosity. We therefore confirm the
    exclusively low-luminosity nature of LRDs, ruling out that LRDs are the counterparts
    of quasars. Furthermore, we speculate that, if the shape of the luminosity function
    holds up, it points to LRDs being powered by low-mass black holes with a narrow
    range of Eddington-level accretion rates.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Yilun
      foaf_name: Ma, Yilun
      foaf_surname: Ma
  - foaf_Person:
      foaf_givenName: Jenny E.
      foaf_name: Greene, Jenny E.
      foaf_surname: Greene
  - foaf_Person:
      foaf_givenName: Marta
      foaf_name: Volonteri, Marta
      foaf_surname: Volonteri
  - foaf_Person:
      foaf_givenName: Andy D.
      foaf_name: Goulding, Andy D.
      foaf_surname: Goulding
  - foaf_Person:
      foaf_givenName: David J.
      foaf_name: Setton, David J.
      foaf_surname: Setton
  - foaf_Person:
      foaf_givenName: Marianna
      foaf_name: Annunziatella, Marianna
      foaf_surname: Annunziatella
  - foaf_Person:
      foaf_givenName: Eiichi
      foaf_name: Egami, Eiichi
      foaf_surname: Egami
  - foaf_Person:
      foaf_givenName: Xiaohui
      foaf_name: Fan, Xiaohui
      foaf_surname: Fan
  - foaf_Person:
      foaf_givenName: Vasily
      foaf_name: Kokorev, Vasily
      foaf_surname: Kokorev
  - foaf_Person:
      foaf_givenName: Ivo
      foaf_name: Labbe, Ivo
      foaf_surname: Labbe
  - foaf_Person:
      foaf_givenName: Xiaojing
      foaf_name: Lin, Xiaojing
      foaf_surname: Lin
  - foaf_Person:
      foaf_givenName: Danilo
      foaf_name: Marchesini, Danilo
      foaf_surname: Marchesini
  - foaf_Person:
      foaf_givenName: Jorryt J
      foaf_name: Matthee, Jorryt J
      foaf_surname: Matthee
      foaf_workInfoHomepage: http://www.librecat.org/personId=7439a258-f3c0-11ec-9501-9df22fe06720
    orcid: 0000-0003-2871-127X
  - foaf_Person:
      foaf_givenName: Themiya
      foaf_name: Nanayakkara, Themiya
      foaf_surname: Nanayakkara
  - foaf_Person:
      foaf_givenName: Luke
      foaf_name: Robbins, Luke
      foaf_surname: Robbins
  - foaf_Person:
      foaf_givenName: Anna
      foaf_name: Sajina, Anna
      foaf_surname: Sajina
  - foaf_Person:
      foaf_givenName: Marcin
      foaf_name: Sawicki, Marcin
      foaf_surname: Sawicki
  bibo_doi: 10.3847/2041-8213/aea071
  bibo_issue: '2'
  bibo_volume: 1008
  dct_date: 2026^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/2041-8205
  - http://id.crossref.org/issn/2041-8213
  dct_language: eng
  dct_publisher: IOP Publishing@
  dct_title: 'No luminous Little Red Dots: A sharp cutoff in their luminosity function@'
...