Results 1 to 10 of about 22,853 (217)
Inhomogeneous reionization models in cosmological hydrodynamical simulations [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 In this work we present a new hybrid method to simulate the thermal effects of the reionization in cosmological hydrodynamical simulations. The method improves upon the standard approach used in simulations of the intergalactic medium (IGM) and galaxy ...
Jose Onorbe, Frederick B Davies
exaly +4 more sources
Simulating Reionization: Character and Observability [PDF]
AIP Conference Proceedings, 1999 In recent years there has been considerable progress in our understanding of the nature and properties of the reionization process. In particular, the numerical simulations of this epoch have made a qualitative leap forward, reaching sufficiently large ...
Bautz, M +19 more
core +7 more sources
The Impact of Patchy Reionization on Ultrafaint Dwarf Galaxies
The Astrophysical Journal, 2023 We investigate how patchy reionization affects the star formation history (SFH) and stellar metallicity of ultrafaint dwarf galaxies (UFDs). Patchy reionization refers to varying ultraviolet background strengths depending on a galaxy’s environment ...
Jaeeun Kim +5 more
doaj +1 more source
Bridging the Gap between Cosmic Dawn and Reionization Favors Models Dominated by Faint Galaxies
The Astrophysical Journal, 2023 It has been claimed that traditional models struggle to explain the tentative detection of the 21 cm absorption trough centered at z ∼ 17 measured by the EDGES collaboration. On the other hand, it has been shown that the EDGES results are consistent with
Ankita Bera +6 more
doaj +1 more source
The Epoch of Reionization in Warm Dark Matter Scenarios
Universe, 2021 In this paper we investigate how the Reionization process is affected by early galaxy formation in different cosmological scenarios. We use a semi-analytic model with suppressed initial power spectra to obtain the UV Luminosity Function in thermal Warm ...
Massimiliano Romanello +2 more
doaj +1 more source
The Astrophysical Journal, 2023 We use large simulations of Ly α emitters with different fractions of ionized intergalactic medium to quantify the clustering of Ly α emitters as measured by the void probability function (VPF), and how it evolves under different ionization scenarios. We
Lucia A. Perez +3 more
doaj +1 more source
Simulating the Cosmic Dawn With Enzo
Frontiers in Astronomy and Space Sciences, 2018 We review two decades of progress using the Enzo hydrodynamic cosmology code to simulate the Cosmic Dawn, a period of roughly 1 billion years beginning with the formation of the first stars in the universe, and ending with cosmic reionization.
Michael L. Norman +5 more
doaj +1 more source
CMB Neutrino Mass Bounds and Reionization [PDF]
, 2010 Current cosmic microwave background (CMB) bounds on the sum of the neutrino masses assume a sudden reionization scenario described by a single parameter that determines the onset of reionization.
Alessandro Melchiorri +4 more
core +2 more sources
Frontiers in Astronomy and Space Sciences, 2017 The reionization of helium at z ~ 3 is the final phase transition of the intergalactic medium and supposed to be driven purely by quasars. The He ii transverse proximity effect—enhanced He ii transmission in a background sightline caused by the ionizing ...
Tobias M. Schmidt +8 more
doaj +1 more source
Measuring the History of Cosmic Reionization using the 21-cm PDF from Simulations [PDF]
, 2009 The 21-cm PDF (i.e., distribution of pixel brightness temperatures) is expected to be highly non-Gaussian during reionization and to provide important information on the distribution of density and ionization.
Barkana +32 more
core +5 more sources