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Extreme properties of a compact and massive accreting black hole host in the first 500 Myr

Author

Listed:
  • Roberta Tripodi

    (University of Ljubljana, Faculty of Mathematics and Physics
    Institute for Fundamental Physics of the Universe, IFPU)

  • Nicholas Martis

    (University of Ljubljana, Faculty of Mathematics and Physics)

  • Vladan Markov

    (University of Ljubljana, Faculty of Mathematics and Physics)

  • Maruša Bradač

    (University of Ljubljana, Faculty of Mathematics and Physics)

  • Fabio Di Mascia

    (Scuola Normale Superiore)

  • Vieri Cammelli

    (University of Trieste, Astronomy Unit, Department of Physics)

  • Francesco D’Eugenio

    (University of Cambridge, Kavli Institute for Cosmology
    University of Cambridge, Cavendish Laboratory—Astrophysics Group)

  • Chris Willott

    (NRC Herzberg)

  • Mirko Curti

    (European Southern Observatory)

  • Maulik Bhatt

    (Scuola Normale Superiore)

  • Simona Gallerani

    (Scuola Normale Superiore)

  • Gregor Rihtaršič

    (University of Ljubljana, Faculty of Mathematics and Physics)

  • Jasbir Singh

    (INAF—Osservatorio Astronomico di Brera)

  • Gaia Gaspar

    (Saint Mary’s University, Department of Astronomy and Physics and Institute for Computational Astrophysics)

  • Anishya Harshan

    (University of Ljubljana, Faculty of Mathematics and Physics)

  • Jon Judež

    (University of Ljubljana, Faculty of Mathematics and Physics)

  • Rosa M. Merida

    (Saint Mary’s University, Department of Astronomy and Physics and Institute for Computational Astrophysics)

  • Guillaume Desprez

    (Saint Mary’s University, Department of Astronomy and Physics and Institute for Computational Astrophysics
    University of Groningen, Kapteyn Astronomical Institute)

  • Marcin Sawicki

    (Saint Mary’s University, Department of Astronomy and Physics and Institute for Computational Astrophysics)

  • Ilias Goovaerts

    (Space Telescope Science Institute)

  • Adam Muzzin

    (York University, Department of Physics and Astronomy)

  • Gaël Noirot

    (Space Telescope Science Institute)

  • Ghassan T. E. Sarrouh

    (York University, Department of Physics and Astronomy)

  • Roberto Abraham

    (University of Toronto, David A. Dunlap Department of Astronomy and Astrophysics
    Dunlap Institute for Astronomy and Astrophysics)

  • Yoshihisa Asada

    (Saint Mary’s University, Department of Astronomy and Physics and Institute for Computational Astrophysics
    Kyoto University, Department of Astronomy)

  • Gabriel Brammer

    (University of Copenhagen, Niels Bohr Institute)

  • Vicente Estrada-Carpenter

    (Saint Mary’s University, Department of Astronomy and Physics and Institute for Computational Astrophysics)

  • Giordano Felicioni

    (University of Ljubljana, Faculty of Mathematics and Physics)

  • Seiji Fujimoto

    (University of Toronto, David A. Dunlap Department of Astronomy and Astrophysics
    The University of Texas at Austin, Department of Astronomy)

  • Kartheik Iyer

    (Columbia University, Columbia Astrophysics Laboratory)

  • Lamiya Mowla

    (Wellesley College, Whitin Observatory, Department of Physics and Astronomy)

  • Victoria Strait

    (University of Copenhagen, Niels Bohr Institute
    Cosmic Dawn Center (DAWN))

Abstract

Little red dots (LRDs) are a high redshift galaxy population. Despite their high number densities, their nature is still uncertain. Here we present CANUCS-LRD-z8.6, a spectroscopically confirmed little red dot at a spectroscopic redshift of zspec = 8.6319, hosting an active galactic nucleus. Its spectrum exhibits broad Hβλ4863 Å emission, high-ionization lines (C iv, N iv]), high electron temperature, which are indicative of active galactic nucleus activity, and low metallicity (Z

Suggested Citation

  • Roberta Tripodi & Nicholas Martis & Vladan Markov & Maruša Bradač & Fabio Di Mascia & Vieri Cammelli & Francesco D’Eugenio & Chris Willott & Mirko Curti & Maulik Bhatt & Simona Gallerani & Gregor Riht, 2025. "Extreme properties of a compact and massive accreting black hole host in the first 500 Myr," Nature Communications, Nature, vol. 16(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-65070-x
    DOI: 10.1038/s41467-025-65070-x
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    References listed on IDEAS

    as
    1. Adam C. Carnall & Ross J. McLure & James S. Dunlop & Derek J. McLeod & Vivienne Wild & Fergus Cullen & Dan Magee & Ryan Begley & Andrea Cimatti & Callum T. Donnan & Massissilia L. Hamadouche & Sophie , 2023. "A massive quiescent galaxy at redshift 4.658," Nature, Nature, vol. 619(7971), pages 716-719, July.
    2. Xuheng Ding & Masafusa Onoue & John D. Silverman & Yoshiki Matsuoka & Takuma Izumi & Michael A. Strauss & Knud Jahnke & Camryn L. Phillips & Junyao Li & Marta Volonteri & Zoltan Haiman & Irham Taufik , 2023. "Detection of stellar light from quasar host galaxies at redshifts above 6," Nature, Nature, vol. 621(7977), pages 51-55, September.
    3. Simon F. Portegies Zwart & Holger Baumgardt & Piet Hut & Junichiro Makino & Stephen L. W. McMillan, 2004. "Formation of massive black holes through runaway collisions in dense young star clusters," Nature, Nature, vol. 428(6984), pages 724-726, April.
    4. Roberto Maiolino & Jan Scholtz & Joris Witstok & Stefano Carniani & Francesco D’Eugenio & Anna Graaff & Hannah Übler & Sandro Tacchella & Emma Curtis-Lake & Santiago Arribas & Andrew Bunker & Stéphane, 2024. "A small and vigorous black hole in the early Universe," Nature, Nature, vol. 627(8002), pages 59-63, March.
    5. Roberto Maiolino & Jan Scholtz & Joris Witstok & Stefano Carniani & Francesco D’Eugenio & Anna Graaff & Hannah Übler & Sandro Tacchella & Emma Curtis-Lake & Santiago Arribas & Andrew Bunker & Stéphane, 2024. "Author Correction: A small and vigorous black hole in the early Universe," Nature, Nature, vol. 630(8015), pages 2-2, June.
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