Results 51 to 60 of about 26,307 (200)

The Role of Secondary Recoil Leaders in the Formation of Subsequent Return Strokes

Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.
Abstract Recoil leaders develop in lightning flash decayed channels. The propagation of a recoil leader depends on the charges stored at its tip and the conductivity of the decayed channel. When the recoil leader propagates over the entire channel, a subsequent return stroke happens.
Ivan T. Cruz, Marcelo M. F. Saba, José Claudio O. Silva, Carina Schumann   +3 more
wiley   +1 more source

Forecasts for Helium Reionization Detection with Fast Radio Bursts in the Era of Square Kilometre Array

The Astrophysical Journal
The observed dispersion measures (DMs) of fast radio bursts (FRBs) are a good indicator of the amount of ionized material along the propagation paths.
Jun-Jie Wei, Chong-Yu Gao
doaj   +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

Constraints on the Observability of Energetic Neutral Atoms From the Magnetosphere‐Atmosphere Interactions at Callisto and Europa

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract We investigate the emission of energetic neutral atoms (ENAs) from the magnetosphere‐atmosphere interactions at Europa and Callisto that may be observed by an ENA imaging instrument. To do so, we combine the draped electromagnetic fields from the AIKEF hybrid model with a tracing tool for the energetic magnetospheric parent ions.
C. Michael Haynes, Tyler Tippens, Sven Simon, Lucas Liuzzo   +3 more
wiley   +1 more source

A SPectroscopic Survey of Biased Halos In the Reionization Era (ASPIRE): JWST Supports Earlier Reionization around [O iii] Emitters

The Astrophysical Journal
Understanding when and how reionization happened is crucial for studying the early structure formation and the properties of the first galaxies in the Universe. At z > 5.5, the observed intergalactic medium (IGM) optical depth shows a significant scatter,
Xiangyu Jin, Jinyi Yang, Xiaohui Fan, Feige Wang, Koki Kakiichi, Romain A. Meyer, George D. Becker, Siwei Zou, Eduardo Bañados, Jaclyn B. Champagne, Valentina D’Odorico, Minghao Yue, Sarah E. I. Bosman, Zheng Cai, Anna-Christina Eilers, Joseph F. Hennawi, Hyunsung D. Jun, Mingyu Li, Zihao Li, Weizhe Liu, Maria Pudoka, Sindhu Satyavolu, Fengwu Sun, Wei Leong Tee, Yunjing Wu   +24 more
doaj   +1 more source

Radio Frequency Interference Detection Using Swin Transformer Embedding U2‐Net

Advances in Astronomy, Volume 2025, Issue 1, 2025.
Radio frequency interference (RFI) is radio wave interference from natural sources or man‐made models. In radio astronomy research, the signals of celestial objects captured by radio telescopes are extremely weak, and the presence of RFI can significantly mask or distort those signals, reducing the accuracy of observational data and seriously affecting
Shengdi Chen, Bo Liang, Sándor Frey
wiley   +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

Architecture Design and Ground Performance of Netherlands‐China Low‐Frequency Explorer

Radio Science, Volume 59, Issue 8, August 2024.
Abstract The Netherlands‐China Low‐Frequency Explorer (NCLE) (Boonstra et al., 2017, https://www.ursi.org/proceedings/procGA17/papers/Paper_J19‐2(1603).pdf; Chen et al., 2020, https://ui.adsabs.harvard.edu/abs/2020AAS…23610203C/abstract) is a radio instrument for astrophysical studies in the low‐frequency range (80 kHz–80 MHz).
Sukanth Karapakula, Christiaan Brinkerink, Antonio Vecchio, Hamid R. Pourshaghaghi, Peter Dolron, Roel Jordans, Eric Bertels, Gerard Aalbers, Mark Ruiter, Albert J. Boonstra, Mark Bentum, David Prinsloo, Michel Arts, Jeanette Bast, Sieds Damstra, Albert van Duin, Nico Ebbendorf, Hans van der Marel, Juergen Morawietz, Roel Witvers, Wietse Poiesz, Rico van Dongen, Baptiste Cecconi, Philippe Zarka, Moustapha Dekkali, Linjie Chen, Mingyuan Wang, Mo Zhang, Maohai Huang, Yihua Yan, Liang Dong, Baolin Tan, Lihua Zhang, Liang Xiong, Ji Sun, Hongbo Zhang, Jinsong Ping, Marc Klein Wolt, Heino Falcke   +38 more
wiley   +1 more source

Gas‐Phase Formation of Sulfurous Acid (H2SO3) in the Atmosphere

Angewandte Chemie International Edition, Volume 63, Issue 30, July 22, 2024.
Laboratory experiments show the formation of sulfurous acid (H2SO3) from the gas‐phase reaction of OH radicals with CH3S(O)OH for atmospheric reaction conditions with a molar yield of ∼50 %. H2SO3 represents a hard‐to‐reach acid that has never been observed in aqueous solution. In the gas phase, if once formed, it shows a certain kinetic stability with
Torsten Berndt, Erik H. Hoffmann, Andreas Tilgner, Hartmut Herrmann   +3 more
wiley   +1 more source

Harrison-Z'eldovich primordial spectrum is consistent with observations [PDF]

, 2010
Inflation predicts primordial scalar perturbations with a nearly scale-invariant spectrum and a spectral index approximately unity (the Harrison--Zel'dovich (HZ) spectrum).
A. A. Starobinsky, Alessandro Melchiorri, Asantha Cooray, Edward W. Kolb, Elena Giusarma, Olga Mena, Paolo Serra, Stefania Pandolfi, Y. B. Zel’dovich   +8 more
core   +4 more sources