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First light and reionization epoch simulations (FLARES) X iii: the lyman-continuum emission of high-redshift galaxies

  • Louise T.C. Seeyave*
  • , Stephen M. Wilkins
  • , Jussi K. Kuusisto
  • , Christopher C. Lovell
  • , Dimitrios Irodotou
  • , Charlotte Simmonds
  • , Aswin P. Vijayan
  • , Peter A. Thomas
  • , William J. Roper
  • , Conor M. Byrne
  • , Gareth T. Jones
  • , Jack C. Turner
  • , Christopher J. Conselice
  • *Corresponding author for this work
  • University of Malta
  • University of Portsmouth
  • University of Helsinki
  • University of Cambridge
  • University of Warwick
  • University of Manchester
  • University of Sussex

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The history of reionization is highly dependent on the ionizing properties of high-redshift galaxies. It is therefore important to have a solid understanding of how the ionizing properties of galaxies are linked to physical and observable quantities. In this paper, we use the First Light and Reionization Epoch Simulations (Flares) to study the Lyman-continuum (LyC, i.e. hydrogen-ionizing) emission of massive (⁠M∗>108M⊙⁠) galaxies at redshifts z = 5 − 10. We find that the specific ionizing emissivity (i.e. intrinsic ionizing emissivity per unit stellar mass) decreases as stellar mass increases, due to the combined effects of increasing age and metallicity.
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Volume525
Issue number2
Pages (from-to)2422-2440
ISSN0035-8711
DOIs
Publication statusPublished - 2023

Keywords

  • Dark ages, reionization, first stars
  • Galaxies: evolution
  • Galaxies: formation
  • Galaxies: high-redshift
  • Methods: numerical

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