Recent Comments

    Epoch of Reionizaiton tagged posts

    Most accurate Statistical Description of Faint Primordial Galaxies 500 M yrs after Big Bang generated

    September 9, 2015, Categories  Physics, Astronomy/Space

    The three panels show different components of near-infrared background light detected by the Hubble Space Telescope in deep-sky surveys. The one on the left is a mosaic of images taken over a 10-year period. When all the stars and galaxies are masked, the background signals can be isolated, as seen in the second and third panels. The middle one reveals “intrahalo light” from rogue stars torn from their host galaxies, and the panel on the right captures the signature of the first galaxies formed in the universe.Ketron Mitchell-Wynne / UCI

    Most accurate Statistical Description of Faint Primordial Galaxies 500 M yrs after Big Bang generated

    The University of California, Irvine and Baltimore’s Space Telescope Science Institute team describes its use of a new statistical method to analyze Hubble data of lengthy sky surveys. The method enabled the scientists to parse out signals from the noise in Hubble’s deep-sky images, providing the first estimate of the number of small, primordial galaxies in the early universe. There are close to 10X more of these galaxies than were previously detected in deep Hubble surveys.

    The period under investigation is called the “epoch of reionization”, post-Big Bang and a few hundred million years in which a dark universe was dominated by photon-absorbing neutral hydrogen, the epoch of reionization...

    Read More