Results 71 to 80 of about 829 (204)

Testing Lorentz Symmetry Using High Energy Astrophysics Observations

open access: yes, 2017
We discuss some of the tests of Lorentz symmetry made possible by astrophysical observations of ultrahigh energy cosmic rays, gamma-rays, and neutrinos. These are among the most sensitive tests of Lorentz invariance violation because they are the highest
Stecker, Floyd W., Floyd Stecker
core   +1 more source

Seasonal Ice Dynamics Control the Timing of Crevasse Drainage at a Fast‐Flowing Outlet Glacier

open access: yesAGU Advances, Volume 7, Issue 3, June 2026.
Abstract Crevasse field drainage transfers at least half of the seasonal runoff from the surface to the bed of the Greenland Ice Sheet, but the patterns of drainage are complex and spatio‐temporally heterogenous. To better understand controls on crevasse drainage processes, we use an automated deep learning method to map the seasonal filling and ...
T. R. Chudley   +7 more
wiley   +1 more source

Mapping Quartz and Feldspar Areal Abundance and Grain Sizes Using Integrated VTIR Data

open access: yesAGU Advances, Volume 7, Issue 3, June 2026.
Abstract Mineral dust is sourced from arid regions around the globe, and its composition impacts regional and global environments by affecting radiation balance, cloud formation, nutrient deposition, and snowmelt. As such, mineral dust plays a key role in Earth's energy and biogeochemical budgets.
Kathleen Grant   +5 more
wiley   +1 more source

On the properties of single-separator MHS equilibria and the nature of separator reconnection

open access: yes, 2015
This thesis considers the properties of MHS equilibria formed through non-resistive MHD relaxation of analytical non-potential magnetic field models, which contain two null points connected by a generic separator. Four types of analytical magnetic fields
Stevenson, Julie E. H.
core  

Critical Kinetic Plasma Processes In Relativistic Astrophysics [PDF]

open access: yes, 2005
Plasma astrophysics deals with collective plasma processes in astrophysical scenarios. As observational astronomy pushes towards unprecedented resolutions in space and time, the focus of theoretical research necessarily ventures towards a description of ...
Jaroschek, C.   +2 more
core  

High-Energy Astrophysics: Multi-Satellite Observations of X-ray Binaries [PDF]

open access: yes
X-ray binaries, consisting of a compact object (either a black hole or a neutron star) accreting matter from a companion star, are among the most luminous sources of high-energy radiation in the universe.
Dai, Xiaohang
core   +1 more source

Missing Summer Westerly Jet Barotropic Governor Effect Explains Climate Models—Observation Discrepancies in the Indian Monsoon Trends

open access: yesAGU Advances, Volume 7, Issue 3, June 2026.
Abstract The South Asian summer monsoon has exhibited a pronounced Northwest India‐Indo‐Gangetic Plains rainfall dipole since 1999, with northwest India experiencing a 24.6% increase, while rainfall in the Indo‐Gangetic Plain has decreased by 4.4%.
Nimmakanti Mahendra   +5 more
wiley   +1 more source

Laboratory-astrophysics jet experiments at the omega laser facility

open access: yes, 2006
Supersonic collimated jets are ubiquitous phenomena in astrophysics. Detailed information about astrophysical jets has traditionally come only from telescopes, theoretical analysis and numerical, resolution-limited, computer simulations which may not ...
K. Dannenberg   +12 more
core   +1 more source

Nitric Oxide Intensification Associated With STEVE: TIMED/SABER‐REGO Observations and Comparison With GITM Simulation

open access: yesAGU Advances, Volume 7, Issue 3, June 2026.
Abstract Strong Thermal Emission Velocity Enhancement (STEVE) is a nightsky optical phenomenon of great research interest in recent years. STEVE is recognized to be co‐located with a latitudinally narrow channel of fast westward ion drifts, also known as “subauroral ion drifts” (SAID).
Jun Liang   +7 more
wiley   +1 more source

First Observation of Sawtooth‐Like Undulations in Afternoon Detached Auroral Arcs Modulated by Surface Waves at the Plasmaspheric Plume Boundary

open access: yesAGU Advances, Volume 7, Issue 3, June 2026.
Abstract The afternoon detached auroral arc is an important phenomenon in the subauroral region, reflecting coupling processes between the Earth's magnetosphere and ionosphere. Previous studies have not identified fine‐scale structures in such arcs, leaving the dynamics underlying their formation poorly understood.
Huiting Feng   +19 more
wiley   +1 more source

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