Results 121 to 130 of about 77,605 (280)
Gamma rays from active galactic nuclei [PDF]
The general properties of Active Galactic Nuclei (AGN) and quasars are reviewed with emphasis on their continuum spectral emission. Two general classes of models for the continuum are outlined and critically reviewed in view of the impending GRO (Gamma ...
Kazanas, Demosthenes
core +1 more source
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley +1 more source
BASS. XLVIII. [Ne V] λ3427 Emission in Powerful Nearby Active Galactic Nuclei
The Astrophysical JournalWe investigate the high-ionization, narrow [Ne V ] λ 3427 line emission in a sample of over 340 ultrahard X-ray (14–195 keV) selected active galactic nuclei (AGN) drawn from the BAT AGN Spectroscopic Survey project.
Tomer Reiss +16 more
doaj +1 more source
"Fermi" bubbles are bursting from our galaxy. Their origins remain a mystery. [PDF]
Proc Natl Acad Sci U S A, 2023 Mann A.
europepmc +1 more source
A History of UNAVCO: Four Decades of Advancing Geodesy
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract UNAVCO was a university‐governed consortium funded by the National Science Foundation (NSF), with support from the National Aeronautics and Space Administration (NASA) and the United States Geological Survey (USGS), to support geoscience research and education using geodesy.
Emily E. Zawacki +4 more
wiley +1 more source
“Lab‐Quakes”: Quantifying the Complete Energy Budget of High‐Pressure Laboratory Failure
AGU Advances, Volume 6, Issue 5, October 2025.Abstract Understanding the interplay of various energy sinks during seismic fault slip is essential for advancing earthquake physics and improving hazard assessment. However, quantifying the energy consumed by major dissipative processes remains a challenge.
Daniel Ortega‐Arroyo +7 more
wiley +1 more source
Earth Wind‐Driven Formation of Hematite on the Lunar Surface
Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.Abstract The recent discovery of hematite (Fe2O3 ${\text{Fe}}_{2}{\mathrm{O}}_{3}$) in lunar high‐latitude regions challenges the notion that the Moon exists in a reduced state. However, the origin of hematite remains unclear. We conducted irradiation experiments using 10 keV O2+ ${\mathrm{O}}_{2}^{+}$ and H2+ ${\mathrm{H}}_{2}^{+}$ ions on Fe‐bearing ...
Xiandi Zeng +7 more
wiley +1 more source
Enceladus Water Plume Modeling Using DSMC
Journal of Geophysical Research: Planets, Volume 130, Issue 9, September 2025.Abstract This study investigates the water plumes of Saturn's moon, Enceladus, using Direct Simulation Monte Carlo (DSMC) modeling to analyze venting dynamics and plume structures. Building on prior research, we employ a parametrized DSMC approach to model water vapor and ice particle flows, leveraging Cassini spacecraft data from instruments such as ...
A. Mahieux +9 more
wiley +1 more source
The Nature of the Energy Source in Radio Galaxies and Active Galactic Nuclei [PDF]
, 1982 F. Pacini, M. Salvati
openalex +1 more source