Results 51 to 60 of about 22,853 (217)

Lyα visibility from z = 4.5 to 11 in the UDS field: Evidence for a high neutral hydrogen fraction and small ionized bubbles at z ∼ 7

Astronomy & Astrophysics
The resonant scattering nature of Lyα photons interacting with neutral hydrogen makes Lyα emitters (LAEs) robust tracers of the intergalactic neutral hydrogen fraction, and thus sensitive probes of cosmic reionization.
Napolitano L., Pentericci L., Dickinson M., Arrabal Haro P., Taylor A. J., Calabrò A., Bhagwat A., Santini P., Arevalo-Gonzalez F., Begley R., Castellano M., Ciardi B., Donnan C. T., Dottorini D., Dunlop J. S., Finkelstein S. L., Fontana A., Giavalisco M., Hirschmann M., Jung I., Koekemoer A. M., Kokorev V., Llerena M., Lucas R. A., Mascia S., Merlin E., Pérez-González P. G., Stanton T. M., Tripodi R., Wang X., Weiner B. J.   +30 more
doaj   +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

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

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

Fast large-scale reionization simulations [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
We present an efficient method to generate large simulations of the Epoch of Reionization (EoR) without the need for a full 3-dimensional radiative transfer code. Large dark-matter-only simulations are post-processed to produce maps of the redshifted 21cm emission from neutral hydrogen.
Thomas, R., Zaroubi, S., Ciardi, B., Pawlik, A., Labropoulos, P., Jelic, V., Bernardi, G., Brentjens, M., de Bruyn, A., Harker, G., Koopmans, L., Mellema, G., Pandey, V., Schaye, J., Yatawatta, S.   +14 more
openaire   +3 more sources

A Proteochemometric Model for Ligands of the SLC5 Transporter Family

Archiv der Pharmazie, Volume 359, Issue 1, January 2026.
A novel proteochemometric model was developed to predict the activity and selectivity of SLC5 family inhibitors. The model's performance was validated using 10‐fold cross‐validation on publicly available datasets achieving Q2 = 0.79 and MSE < 0.32. Detailed analysis of the results enabled the identification of a new, previously unrecognized selectivity‐
Martin Juhás, Gerhard Ecker
wiley   +1 more source

Semi-Numerical Simulation of Reionization with Semi-Analytical Modeling of Galaxy Formation

, 2012
In a semi-numerical model of reionization, the evolution of ionization fraction is simulated approximately by the ionizing photon to baryon ratio criterion.
Chen, Xuelei, Guo, Qi, Liu, Gaochao, Xu, Yidong, Yue, Bin, Zhou, Jie   +5 more
core   +1 more source

Cosmic reionization constraints on the nature of cosmological perturbations [PDF]

, 2006
We study the reionization history of the Universe in cosmological models with non-Gaussian density fluctuations, taking them to have a renormalized $\chi^2$ probability distribution function parametrized by the number of degrees of freedom, $\nu$.
Avelino, Pedro P, Liddle, Andrew R
core   +2 more sources

Dust from reionization

Astronomy & Astrophysics, 2004
The possibility that population III stars have reionized the Universe at redshifts greater than 6 has recently gained mo- mentum with WMAP polarization results. Here we analyse the role of early dust produced by these stars and ejected into the in- tergalactic medium.
Elfgren, Erik, Désert, Francois-Xavier
openaire   +3 more sources

Large‐Scale Simulations of Reionization [PDF]

The Astrophysical Journal, 2007
25 ...
Kohler, Katharina, Gnedin, Nickolay Y., Hamilton, Andrew J. S.   +2 more
openaire   +2 more sources