Results 101 to 110 of about 27,730 (253)
Studying the Sources of Cosmic Reionization with 21-cm Fluctuations [PDF]
, 2008 We explore the ability of measurements of the 21-cm power spectrum during reionization to enable the simultaneous reconstruction of the reionization history and the properties of the ionizing sources. For various sets of simulated 21-cm measurements, we perform maximum likelihood fits in order to constrain the reionization and galaxy formation ...
arxiv +1 more source
Constraints on Patchy Reionization from Planck CMB Temperature Trispectrum [PDF]
Phys. Rev. D 97, 063505 (2018), 2017 We present constraints on the patchy reionization by measuring the trispectrum of the Planck 2015 cosmic microwave background (CMB) temperature anisotropies. The patchy reionization leads to anisotropies in the CMB optical depth, and the statistics of the observed CMB anisotropies is altered.
arxiv +1 more source
Constraining local UV field geometry at reionization using Milky Way satellites
EPJ Web of Conferences, 2012 We present a new semi-analytical model of the population of satellite galaxies of the Milky Way, aimed at estimating the effect of the geometry of reionization at galaxy scale on the properties of the satellites. In this model reionization can be either:
Aubert D., Ocvirk P.
doaj +1 more source
Reionization and Cosmology with 21 cm Fluctuations [PDF]
, 2009 Measurement of the spatial distribution of neutral hydrogen via the redshifted 21 cm line promises to revolutionize our knowledge of the epoch of reionization and the first galaxies, and may provide a powerful new tool for observational cosmology from ...
J. Stuart B. Wyithe +4 more
core +1 more source
The Low-redshift Lyman Continuum Survey. I. New, Diverse Local Lyman Continuum Emitters
The Astrophysical Journal Supplement Series, 2022 The origins of Lyman continuum (LyC) photons responsible for the reionization of the universe are as of yet unknown and highly contested. Detecting LyC photons from the Epoch of Reionization is not possible due to absorption by the intergalactic medium ...
Sophia R. Flury +46 more
doaj +1 more source
Secondary CMB anisotropies in a universe reionized in patches
, 1998 In a universe reionized in patches, the Doppler effect from Thomson scattering off free electrons generates secondary cosmic microwave background (CMB) anisotropies.
Aghanim N. +6 more
core +2 more sources
Cosmological perturbations and the reionization epoch [PDF]
, 2003 We investigate the dependence of the epoch of reionization on the properties of cosmological perturbations, in the context of cosmologies permitted by WMAP.
Avelino, Pedro P, Liddle, Andrew R
core +2 more sources
The effect of minihaloes on cosmic reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 One of the most debated issues in the theoretical modeling of cosmic reionization is the impact of small-mass gravitationally-bound structures. We carry out the first numerical investigation of the role of such sterile `minihaloes', which serve as self-shielding screens of ionizing photons.
Ciardi, B. +5 more
openaire +6 more sources
The Effect of Absorption Systems on Cosmic Reionization [PDF]
, 2012 We use large-scale simulations to investigate the morphology of reionization during the final, overlap phase. Our method uses an efficient three-dimensional smoothing technique which takes into account the finite mean free path due to absorption systems,
Abel +25 more
core +2 more sources
LIMFAST. III. Timing Cosmic Reionization with the 21 cm and Near-infrared Backgrounds
The Astrophysical JournalThe timeline of cosmic reionization remains uncertain despite sustained efforts to study how the ionizing output of early galaxies shaped the intergalactic medium (IGM).
Guochao Sun +4 more
doaj +1 more source