2015/09/08 by Ketron Mitchell-Wynne, Asantha Cooray, Yan Gong +16 · 55 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #Galaxy #Luminosity #Physics #Radio Astronomy Observations and Technology #Redshift #Reionization #Sky #Stars #Ultraviolet #Universe #astro-ph.CO
paper · pdf · doi:10.1038/ncomms8945
published in Nature Communications 6(1), 7945 (Nature Portfolio) · The official typeset version is available from the Nature Communications website at http://www.nature.com/ncomms/2015/150907/ncomms8945/full/ncomms8945.html The data used in this work can be found at http://herschel.uci.edu/CANDELS/
openalex publication_date 2015/09/08 · arxiv created 2015/09/09 · arxiv updated 2015/10/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 log ρ(UV) = 27.4(+0.2)(-1.2) ergs(-1) Hz(-1) Mpc(-3) (1σ). 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.