---
res:
  bibo_abstract:
  - "We construct and characterize a sample of 146 little red dots (LRDs) across 2.0<z<9.3,
    selecting all sources with v-shaped\r\nultraviolet (UV)–optical continua from
    James Webb Space Telescope (JWST) NIRSpec/PRISM spectra and compact morphologies
    in NIRCam/F444W imaging. We show that LRD continuum spectra are well described
    by modified blackbodies\r\nacross ∼ 0.4 − 1.0 µm, with typical T ∼ 5000 K (λpeak
    ∼ 0.65 µm) across 2 dex in luminosity, and a tail toward T ∼ 2000 K.\r\nLRDs therefore
    trace a locus in the Hertzsprung–Russell diagram that is analogous to stars on
    the Hayashi track, strongly\r\nsupporting the picture that LRDs are active galactic
    nucleus (AGN) embedded in optically thick dense gas envelopes.\r\nHotter LRDs
    with λpeak < 0.65 µm typically have strong Balmer breaks, redder UV slopes, and
    high optical luminosities;\r\nother LRDs show weak or no Balmer breaks, and wide
    variety in βUV and L5100. Crucially, we demonstrate that the UV–\r\noptical continua
    are strongly linked to the Hα, Hβ, [O iii], and O i line properties. There is
    a tight linear relation between\r\nthe Hα and optical continuum luminosities,
    as well as Hα and O i λ8446, indicating that Balmer, O i, and optical emission\r\nmust
    primarily be powered by the same source. The Balmer decrement increases strongly
    toward higher LHα, L5100, and\r\nBalmer break strength, providing key evidence
    for luminosity-dependent effects of collisional (de-)excitation and resonant\r\nscattering
    in the gaseous envelopes. In contrast, we show that [O iii] emission likely originates
    from star-forming host\r\ngalaxies, with strong variation in the AGN-to-host ratio
    among the LRD population. Our work presents an empirical\r\ndescription of the
    nature and structure of LRDs, defining a new benchmark for ongoing LRD model developments.@eng"
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Anna
      foaf_name: de Graaff, Anna
      foaf_surname: de Graaff
  - foaf_Person:
      foaf_givenName: Raphael E
      foaf_name: Hviding, Raphael E
      foaf_surname: Hviding
  - foaf_Person:
      foaf_givenName: Rohan P
      foaf_name: Naidu, Rohan P
      foaf_surname: Naidu
  - foaf_Person:
      foaf_givenName: Jenny E
      foaf_name: Greene, Jenny E
      foaf_surname: Greene
  - foaf_Person:
      foaf_givenName: Tim B
      foaf_name: Miller, Tim B
      foaf_surname: Miller
  - foaf_Person:
      foaf_givenName: Joel
      foaf_name: Leja, Joel
      foaf_surname: Leja
  - 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: Gabriel
      foaf_name: Brammer, Gabriel
      foaf_surname: Brammer
  - foaf_Person:
      foaf_givenName: Harley
      foaf_name: Katz, Harley
      foaf_surname: Katz
  - foaf_Person:
      foaf_givenName: Rachel
      foaf_name: Bezanson, Rachel
      foaf_surname: Bezanson
  - foaf_Person:
      foaf_givenName: Leindert A
      foaf_name: Boogaard, Leindert A
      foaf_surname: Boogaard
  - foaf_Person:
      foaf_givenName: Sownak
      foaf_name: Bose, Sownak
      foaf_surname: Bose
  - foaf_Person:
      foaf_givenName: John
      foaf_name: Chisholm, John
      foaf_surname: Chisholm
  - foaf_Person:
      foaf_givenName: Nikko J
      foaf_name: Cleri, Nikko J
      foaf_surname: Cleri
  - foaf_Person:
      foaf_givenName: Pratika
      foaf_name: Dayal, Pratika
      foaf_surname: Dayal
  - foaf_Person:
      foaf_givenName: Robert
      foaf_name: Feldmann, Robert
      foaf_surname: Feldmann
  - foaf_Person:
      foaf_givenName: Yoshinobu
      foaf_name: Fudamoto, Yoshinobu
      foaf_surname: Fudamoto
  - foaf_Person:
      foaf_givenName: Seiji
      foaf_name: Fujimoto, Seiji
      foaf_surname: Fujimoto
  - foaf_Person:
      foaf_givenName: Lukas J
      foaf_name: Furtak, Lukas J
      foaf_surname: Furtak
  - foaf_Person:
      foaf_givenName: Karl
      foaf_name: Glazebrook, Karl
      foaf_surname: Glazebrook
  - foaf_Person:
      foaf_givenName: Rashmi
      foaf_name: Gottumukkala, Rashmi
      foaf_surname: Gottumukkala
  - foaf_Person:
      foaf_givenName: Kasper E
      foaf_name: Heintz, Kasper E
      foaf_surname: Heintz
  - 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: Michael V
      foaf_name: Maseda, Michael V
      foaf_surname: Maseda
  - foaf_Person:
      foaf_givenName: Ian
      foaf_name: McConachie, Ian
      foaf_surname: McConachie
  - foaf_Person:
      foaf_givenName: Themiya
      foaf_name: Nanayakkara, Themiya
      foaf_surname: Nanayakkara
  - foaf_Person:
      foaf_givenName: Erica
      foaf_name: Nelson, Erica
      foaf_surname: Nelson
  - foaf_Person:
      foaf_givenName: Przemysław
      foaf_name: Nowaczyk, Przemysław
      foaf_surname: Nowaczyk
  - foaf_Person:
      foaf_givenName: Pascal A
      foaf_name: Oesch, Pascal A
      foaf_surname: Oesch
  - foaf_Person:
      foaf_givenName: Hans-Walter
      foaf_name: Rix, Hans-Walter
      foaf_surname: Rix
  - foaf_Person:
      foaf_givenName: David J
      foaf_name: Setton, David J
      foaf_surname: Setton
  - foaf_Person:
      foaf_givenName: Alberto
      foaf_name: Torralba Torregrosa, Alberto
      foaf_surname: Torralba Torregrosa
      foaf_workInfoHomepage: http://www.librecat.org/personId=018f0249-0e87-11f0-b167-cbce08fbd541
    orcid: 0000-0001-5586-6950
  - foaf_Person:
      foaf_givenName: Fabian
      foaf_name: Walter, Fabian
      foaf_surname: Walter
  - foaf_Person:
      foaf_givenName: Bingjie
      foaf_name: Wang, Bingjie
      foaf_surname: Wang
  - foaf_Person:
      foaf_givenName: Andrea
      foaf_name: Weibel, Andrea
      foaf_surname: Weibel
  - foaf_Person:
      foaf_givenName: Arjen
      foaf_name: van der Wel, Arjen
      foaf_surname: van der Wel
  bibo_doi: 10.1093/mnras/stag1567
  bibo_issue: '3'
  bibo_volume: 551
  dct_date: 2026^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0035-8711
  - http://id.crossref.org/issn/1365-2966
  dct_language: eng
  dct_publisher: Oxford University Press@
  dct_title: 'Little red dots host black hole stars: A unified family of gas-reddened
    AGN revealed by JWST/NIRSpec spectroscopy@'
...