Results 141 to 150 of about 75,738 (243)

Craters and Lunar Lua (Pits/Skylights) in Mare Tranquillitatis and Marius Hills Reveal Variations in Protolith Properties

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract We investigated the regolith parent rock (“protolith”) properties of Mare Tranquillitatis and Marius Hills on the Moon, utilizing lunar pit craters (“lua”) to contextualize observations of rock abundance and crater degradation. We discovered a significant difference in underlying materials: the region around the Tranquillitatis lua is ...
E. S. Costello, C. L. Acohido, M. A. Chertok, C. M. Ferrari‐Wong, C. L. Slagle, A. Ito   +5 more
wiley   +1 more source

Simulations of Radiological Dose Quantities in Astronauts During Solar Energetic Particle Events Across Modern Space History

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Solar Particle Events (SPEs) represent one of the most significant hazards to future crewed space missions. Accurate assessment of radiation doses received by astronauts during these events is essential for determining the shielding requirements in spacecraft and off‐planet shelter design.
Sylvain Blunier, Piers Jiggens, Juan A. Valdivia, Aidan Cowley   +3 more
wiley   +1 more source

Search for Kink Events in Variable Fermi-LAT Blazars

The Astrophysical Journal
This study explores the detection of quasiperiodic oscillations (QPOs) in blazars as a method to identify kink events within their jets, utilizing both γ -ray and polarized light observations. Focusing on a sample of nine blazars, we analyze γ -ray light
P. Peñil, H. Zhang, J. Otero-Santos, M. Ajello, S. Buson, S. Adhikari, A. Rico, J. Escudero Pedrosa, I. Agudo, D. Morcuende, A. Sota, V. Casanova, F. J. Aceituno   +12 more
doaj   +1 more source

X-RAY AND $gamma$-RAY ASTRONOMY [PDF]

, 1965
M. Oda
openalex   +1 more source

Forecasting Equatorial Plasma Bubbles From Precursor TEC Signatures Observed by C/NOFS

Space Weather, Volume 24, Issue 1, January 2026.
Abstract This study investigates the potential of localized total electron content (TEC) perturbation measurements, possibly associated with bottomside upwelling of the F‐layer, as precursors for forecasting ionospheric plasma irregularities, particularly the equatorial plasma bubbles (EPBs).
S. K. Das, C. Stolle, Y. Yamazaki, T. Yokoyama, M. Yamamoto, S. Perwitasari   +5 more
wiley   +1 more source

Leptohadronic Multimessenger Modeling of Two High-redshift (z > 1) Neutrino Emission Blazar Candidates

The Astrophysical Journal
The blazars are one of the leading candidate sources of high-energy neutrinos. Recently, two blazars have been found to be temporally and spatially correlated with some IceCube high-energy neutrino events. The two blazars, GB6 J2113+1121 and NVSS J171822+
Xiong Jiang, Neng-Hui Liao, Rui Xue, Yi-Zhong Fan, Da-Ming Wei   +4 more
doaj   +1 more source

Regularised Hyper Parameter Bi Level Optimisation With Continual Learning Based Deep Neural Network for Beamforming in Ultra‐Wide Band System

IET Communications, Volume 20, Issue 1, January/December 2026.
This research proposes a Regularised Hyperparameter Bilevel Optimisation with Continual Learning‐based Deep Neural Network (RHBO‐CLDNN) for beamforming in an Ultra‐Wide Band (UWB) system. The RHBO ensures the hyperparameter efficiency at both upper and lower levels, which allows DNN to fine‐tune the unique characteristics of the UWB system, which leads
Pradeep Kumar Siddanna, Bidare Divakarachari Parameshachari, Dharmanna Shivappa Lamani   +2 more
wiley   +1 more source

Goddard Space Flight Center contributions to the University of California, Santa Cruz Summer Workshop on High Energy Transients [PDF]

Topics addressing the characteristics and emission mechanisms of gamma ray bursts and neutron and gamma ray emission from solar flares are discussed. In addition, observational aspects of gamma ray astronomy are addressed with particular attention given ...

core   +1 more source

Advancements in Very-High-Energy Gamma-Ray Astronomy with Applications to the Study of Cosmic Rays

, 2019
Andrii Petrashyk
openalex   +1 more source

Gamma ray astronomy with IceCube [PDF]

, 2003
F. Halzen, Dan Hooper
openalex   +1 more source