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A massive galaxy that formed its stars at z ≈ 11.
Glazebrook, Karl; Nanayakkara, Themiya; Schreiber, Corentin; Lagos, Claudia; Kawinwanichakij, Lalitwadee; Jacobs, Colin; Chittenden, Harry; Brammer, Gabriel; Kacprzak, Glenn G; Labbe, Ivo; Marchesini, Danilo; Marsan, Z Cemile; Oesch, Pascal A; Papovich, Casey; Remus, Rhea-Silvia; Tran, Kim-Vy H; Esdaile, James; Chandro-Gomez, Angel.
Afiliación
  • Glazebrook K; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria, Australia. kglazebrook@swin.edu.au.
  • Nanayakkara T; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria, Australia.
  • Schreiber C; IBEX Innovations, Stockton-on-Tees, UK.
  • Lagos C; Cosmic DAWN Center, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
  • Kawinwanichakij L; ARC Centre for Excellence in All-Sky Astrophysics in 3D, Canberra, Australian Capital Territory, Australia.
  • Jacobs C; International Centre for Radio Astronomy Research, University of Western Australia, Crawley, Western Australia, Australia.
  • Chittenden H; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria, Australia.
  • Brammer G; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria, Australia.
  • Kacprzak GG; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria, Australia.
  • Labbe I; Cosmic DAWN Center, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
  • Marchesini D; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria, Australia.
  • Marsan ZC; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria, Australia.
  • Oesch PA; Physics and Astronomy Department, Tufts University, Medford, MA, USA.
  • Papovich C; Department of Physics and Astronomy, York University, Toronto, Ontario, Canada.
  • Remus RS; Cosmic DAWN Center, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
  • Tran KH; Department of Astronomy, University of Geneva, Versoix, Switzerland.
  • Esdaile J; Department of Physics and Astronomy, and George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX, USA.
  • Chandro-Gomez A; Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians-Universität München, Munich, Germany.
Nature ; 628(8007): 277-281, 2024 Apr.
Article en En | MEDLINE | ID: mdl-38354832
ABSTRACT
The formation of galaxies by gradual hierarchical co-assembly of baryons and cold dark matter halos is a fundamental paradigm underpinning modern astrophysics1,2 and predicts a strong decline in the number of massive galaxies at early cosmic times3-5. Extremely massive quiescent galaxies (stellar masses of more than 1011 M⊙) have now been observed as early as 1-2 billion years after the Big Bang6-13. These galaxies are extremely constraining on theoretical models, as they had formed 300-500 Myr earlier, and only some models can form massive galaxies this early12,14. Here we report on the spectroscopic observations with the JWST of a massive quiescent galaxy ZF-UDS-7329 at redshift 3.205 ± 0.005. It has eluded deep ground-based spectroscopy8, it is significantly redder than is typical and its spectrum reveals features typical of much older stellar populations. Detailed modelling shows that its stellar population formed around 1.5 billion years earlier in time (z ≈ 11) at an epoch when dark matter halos of sufficient hosting mass had not yet assembled in the standard scenario4,5. This observation may indicate the presence of undetected populations of early galaxies and the possibility of significant gaps in our understanding of early stellar populations, galaxy formation and the nature of dark matter.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nature Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nature Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido