Results 61 to 70 of about 26,451 (248)

The Universe is at Most 88% Neutral at z = 10.6

The Astrophysical Journal Letters, 2023
Recent observations of GN-z11 with JWST have revealed a Ly α emission line with an equivalent width (EW) of 18 ± 2 Å. At z = 10.6, this galaxy is expected to lie in the heart of reionization.
Sean Bruton, Yu-Heng Lin, Claudia Scarlata, Matthew J. Hayes   +3 more
doaj   +1 more source

How does radiative feedback from a UV background impact reionization?

, 2013
An ionizing UV background (UVB) inhibits gas accretion and photo-evaporates gas from the shallow potential wells of small, dwarf galaxies. During cosmological reionization, this effect can result in negative feedback: suppressing star-formation inside ...
Mesinger, Andrei, Sobacchi, Emanuele
core   +1 more source

The Thermal Memory of Reionization History [PDF]

, 2003
The recent measurement by WMAP of a large electron scattering optical depth tau_e = 0.17 +- 0.04 is consistent with a simple model of reionization in which the intergalactic medium (IGM) is ionized at redshift z ~ 15, and remains highly ionized ...
Berezhiani Z. G., Hui L., Lam Hui, Miralda-Escude J., Reimers D., Theuns T., Valageas P., Zoltan Haiman   +7 more
core   +2 more sources

The epoch of helium reionization [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
39 pages, including 13 figures, submitted to ...
Sokasian, A., Abel, T., Hernquist, L.
openaire   +3 more sources

Establishing a relationship between the cosmological 21 cm power spectrum and interferometric closure phases

Astronomy & Astrophysics
Context. Measurements of the cosmic 21 cm background need to achieve a high dynamic range to isolate it from bright foreground emissions. Instrumental calibration inaccuracies can compromise the spectral fidelity of the smooth foreground continuum ...
Keller P. M., Nikolic B., Thyagarajan N.
doaj   +1 more source

Constraining reionization using 21 cm observations in combination with CMB and Lyman-alpha forest data

, 2009
In this paper, we explore the constraints on the reionization history that are provided by current observations of the Lyman-alpha forest and the CMB.
Abraham Loeb, Barkana, Barkana, Barkana, Becker, Becker, Bolton, Bolton, Bolton, Bolton, Bouwens, Bowman, Bowman, Bromm, Bromm, Cen, Chen, Choudhury, Choudhury, Colombo, Dunkley, Fan, Faucher-Giguère, Faucher-Giguère, Faucher-Giguère, Furlanetto, Furlanetto, Furlanetto, Furlanetto, Furlanetto, Gunn, Holder, Hopkins, Hui, J. Stuart B. Wyithe, Jonathan R. Pritchard, Kaplinghat, Komatsu, Leitherer, Lidz, MacKay, Malhotra, McDonald, McQuinn, McQuinn, McQuinn, McQuinn, Meiksin, Miralda-Escudé, Miralda-Escudé, Misawa, Parsons, Pawlik, Press, Pritchard, Pritchard, Ricotti, Ricotti, Santos, Schaye, Schaye, Schaye, Scheuer, Shaver, Songaila, Stark, Storrie-Lombardi, Tanvir, Tegmark, Trac, Trac, Weinberg, Zahn, Zaldarriaga   +73 more
core   +1 more source

First Observations and Characteristics of Positive Upward Illumination Strokes

Geophysical Research Letters, Volume 53, Issue 1, 16 January 2026.
Abstract Upward Illumination (UI) strokes are a subtype of cloud‐to‐ground (CG) return strokes characterized by two concurrent branches striking the ground a few milliseconds apart. The luminous channel of an UI stroke does not connect to the main channel, which gives this phenomenon its name.
Antonio C. V. Saraiva, Paola B. Lauria, Marcelo M. F. Saba, Ivan T. Cruz, Tagianne P. da Silva, Diego R. R. da Silva, Rasha U. Abbasi, Ny Kieu, Listz S. Araujo, Miguel B. Guimarães, Jeff L. Lapierre   +10 more
wiley   +1 more source

Simulating reionization in numerical cosmology [PDF]

New Astronomy, 2001
37 pages, 7 figures, Submitted to ...
Sokasian, A., Abel, T., Hernquist, L. E.
openaire   +3 more sources

An Estimate of the Impact of Reionization on Supermassive Black Hole Growth

The Astrophysical Journal
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, Jarrett L. Johnson, Madeline A. Marshall   +2 more
doaj   +1 more source

The Imprint of Cosmic Reionization on Galaxy Clustering

, 2007
We consider the effect of reionization on the clustering properties of galaxy samples at intermediate redshifts (z~0.3-5.5). Current models for the reionization of intergalactic hydrogen predict that overdense regions will be reionized early, thus ...
A. Loeb, J. S. B. Wyithe, Kriss
core   +1 more source