Are the newly-discovered <i>z</i> ∼ 13 drop-out sources starburst galaxies or quasars?

DOI DOI HANDLE PDF PDF 被引用文献2件 参考文献45件
  • Fabio Pacucci
    Center for Astrophysics | Harvard & Smithsonian , Cambridge, MA 02138, USA
  • Pratika Dayal
    Kapteyn Astronomical Institute, University of Groningen , P.O. Box 800, NL-9700 AV Groningen, The Netherlands
  • Yuichi Harikane
    Institute for Cosmic Ray Research, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan
  • Akio K Inoue
    Department of Physics, School of Advanced Science and Engineering, Faculty of Science and Engineering, Waseda University , 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
  • Abraham Loeb
    Center for Astrophysics | Harvard & Smithsonian , Cambridge, MA 02138, USA

書誌事項

公開日
2022-04-07
資源種別
journal article
権利情報
  • https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model
DOI
  • 10.1093/mnrasl/slac035
  • 10.48550/arxiv.2201.00823
公開者
Oxford University Press (OUP)

この論文をさがす

説明

<jats:title>ABSTRACT</jats:title> <jats:p>The detection of two z ∼ 13 galaxy candidates has opened a new window on galaxy formation at an era only 330 Myr after the big bang. Here, we investigate the physical nature of these sources: are we witnessing star forming galaxies or quasars at such early epochs? If powered by star formation, the observed ultraviolet (UV) luminosities and number densities can be jointly explained if: (i) these galaxies are extreme star-formers with star formation rates 5−24 × higher than those expected from extrapolations of average lower-redshift relations; (ii) the star formation efficiency increases with halo mass and is countered by increasing dust attenuation from z ∼ 10−5; (iii) they form stars with an extremely top-heavy initial mass function. The quasar hypothesis is also plausible, with the UV luminosity produced by black holes of $\sim 10^8 \, \rm M_\odot$ accreting at or slightly above the Eddington rate (fEdd ∼ 1.0). This black hole mass at z ∼ 13 would require very challenging, but not implausible, growth parameters. If spectroscopically confirmed, these two sources will represent a remarkable laboratory to study the Universe at previously inaccessible redshifts.</jats:p>

収録刊行物

被引用文献 (2)*注記

もっと見る

参考文献 (45)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

問題の指摘

ページトップへ