Results 1 to 10 of about 36,124 (299)
How is the reionization epoch defined? [PDF]
Mon.Not.Roy.Astron.Soc. 330 (2002) L43, 2002 We study the effect of a prolonged epoch of reionization on the angular power spectrum of the Cosmic Microwave Background. Typically reionization studies assume a sudden phase transition, with the intergalactic gas moving from a fully neutral to a fully ionized state at a fixed redshift. Such models are at odds, however, with detailed investigations of
Marialuce Bruscoli +2 more
arxiv +9 more sources
The Impact of Patchy Reionization on Ultrafaint Dwarf Galaxies [PDF]
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 +2 more sources
An Estimate of the Impact of Reionization on Supermassive Black Hole Growth [PDF]
The Astrophysical Journal, 2023 The supermassive black holes (SMBHs) that power active galactic nuclei found at z ≥ 6 were formed during the Epoch of Reionization. Because reionization is an inhomogeneous process, the physical properties of SMBH host-galaxy environments will vary ...
Phoebe R. Upton Sanderbeck +2 more
doaj +2 more sources
Long Dark Gaps in the Lyβ Forest at z < 6: Evidence of Ultra-late Reionization from XQR-30 Spectra [PDF]
The Astrophysical Journal, 2022 We present a new investigation of the intergalactic medium near reionization using dark gaps in the Ly β forest. With its lower optical depth, Ly β offers a potentially more sensitive probe to any remaining neutral gas compared to the commonly used Ly α ...
Yongda Zhu +24 more
doaj +2 more sources
Cosmological reionization [PDF]
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2000 In popular cosmological scenarios, some time beyond a redshift of 10, stars within protogalaxies created the first heavy elements; these systems, together perhaps with an early population of quasars, generated the ultraviolet radiation and mechanical energy that reheated and reionized the cosmos.
Piero Madau
openalex +3 more sources
On the Threshold of the Reionization Epoch [PDF]
The Astrophysical Journal, 2001 Replaced with the revised version. To appear in The Astrophysical Journal Letters.
S. G. Djorgovski +3 more
openalex +7 more sources
The Epoch of Helium Reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 39 pages, including 13 figures, submitted to ...
Aaron Sokasian, Lars Hernquist, Tom Abel
openalex +5 more sources
The Astrophysical JournalWe present the evolution of Ly α emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy programs of Early Release Science, General Observer, Director's Discretionary Time, and Guaranteed Time ...
Minami Nakane +8 more
doaj +2 more sources
Cosmic Reionization On Computers: Reionization Histories of Present-day Galaxies [PDF]
The Astrophysical Journal, 2019 We examine the reionization history of present-day galaxies by explicitly tracing the building blocks of halos from the Cosmic Reionization On Computers project. We track dark matter particles that belong to $z=0$ halos to trace the neutral fractions at corresponding positions during rapid global reionization.
Nickolay Y. Gnedin +3 more
arxiv +6 more sources
Probing beyond the Epoch of Hydrogen Reionization with 21 Centimeter Radiation [PDF]
Astrophys.J.596:1-8,2003, 2003 We use numerical simulations of hydrogen reionization by stellar sources in the context of LCDM cosmogonies to investigate the 21 (1+z) cm radio signal expected from the diffuse intergalactic medium (IGM) prior to the epoch of reionization breakthrough at redshift z_ion.
B. Ciardi, Piero Madau
openalex +2 more sources