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Ultraviolet luminosity density of the universe during the epoch of reionization

Author

Listed:
  • Ketron Mitchell-Wynne

    (University of California)

  • Asantha Cooray

    (University of California)

  • Yan Gong

    (University of California
    National Astronomical Observatories, Chinese Academy of Sciences)

  • Matthew Ashby

    (Harvard-Smithsonian Center for Astrophysics)

  • Timothy Dolch

    (Cornell University)

  • Henry Ferguson

    (Space Telescope Science Institute)

  • Steven Finkelstein

    (The University of Texas at Austin)

  • Norman Grogin

    (Space Telescope Science Institute)

  • Dale Kocevski

    (University of Kentucky)

  • Anton Koekemoer

    (Space Telescope Science Institute)

  • Joel Primack

    (University of California Santa Cruz)

  • Joseph Smidt

    (Los Alamos National Laboratory)

Abstract

The spatial fluctuations of the extragalactic background light trace the total emission from all stars and galaxies in the Universe. A multiwavelength study can be used to measure the integrated emission from first galaxies during reionization when the Universe was about 500 million years old. Here we report arcmin-scale spatial fluctuations in one of the deepest sky surveys with the Hubble Space Telescope in five wavebands between 0.6 and 1.6 μm. We model-fit the angular power spectra of intensity fluctuation measurements to find the ultraviolet luminosity density of galaxies at redshifts greater than 8 to be . This level of integrated light emission allows for a significant surface density of fainter primeval galaxies that are below the point-source detection level in current surveys.

Suggested Citation

  • Ketron Mitchell-Wynne & Asantha Cooray & Yan Gong & Matthew Ashby & Timothy Dolch & Henry Ferguson & Steven Finkelstein & Norman Grogin & Dale Kocevski & Anton Koekemoer & Joel Primack & Joseph Smidt, 2015. "Ultraviolet luminosity density of the universe during the epoch of reionization," Nature Communications, Nature, vol. 6(1), pages 1-13, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8945
    DOI: 10.1038/ncomms8945
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