Results 51 to 60 of about 639 (175)

Quasi‐Periodic X‐Ray Variations at BARREL: Role of Electron Precipitation and Solar Wind Driving

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The Balloon Array for Radiation belt Relativistic Electron Losses (BARREL) mission was designed to study the loss of radiation belt electrons to the upper atmosphere. Previous analysis of data from balloon pairs showed that electron precipitation events manifest coherent quasi‐periodic variations (with periodicity on the order of 10–60 min ...
S. Di Matteo, A. W. Breneman, A. J. Halford, N. M. Viall, L. Kepko, K. Cantwell, R. Millan   +6 more
wiley   +1 more source

The Sun and the Heliosphere as an Integrated System

Eos, Transactions American Geophysical Union, 2005
The heliosphere is a bay in the interstellar space around the Sun where the solar wind blows lustily and holds back the magnetic fields and plasma of the local interstellar cloud. According to recent measurements from the Voyager 1 spacecraft, the radius of this bay, which is where the solar wind ceases to be supersonic, is about 94 astronomical units (
openaire   +1 more source

The Impact of the May 2024 Geomagnetic Storm on TRISAT Orbital Decay: A TLE‐Based Analysis With a Lifetime Forecast

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The 10–13 May 2024 geomagnetic storm was one of the strongest space‐weather events of Solar Cycle 25 and produced a major expansion of the thermosphere, substantially increasing atmospheric drag on low‐Earth‐orbit spacecraft. In this study, we quantify the storm‐time orbital response of TRISAT, Slovenia's first 3U CubeSat, using publicly ...
N. Kosanič, I. Kramberger
wiley   +1 more source

Voyager 2 observation of the multifractal spectrum in the heliosphere and the heliosheath [PDF]

Nonlinear Processes in Geophysics, 2013
We look in detail at the multifractal scaling of the fluctuations in the interplanetary magnetic field strength as measured onboard Voyager 2 in the entire heliosphere and even in the heliosheath.
W. M. Macek, A. Wawrzaszek
doaj   +1 more source

Mercury's Alfvén Wing Current System Under Sub‐Alfvénic Solar Wind Conditions: Insights From Global MHD Simulations

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Mercury's proximity to the Sun results in the lowest average Alfvénic Mach number in the upstream solar wind compared to any other planet. Under extreme conditions, the upstream Alfvén speed can exceed the solar wind speed, resulting in a sub‐Alfvénic interaction in which standing Alfvén wings form.
Charles F. Bowers, Xianzhe Jia
wiley   +1 more source

JD 7: The Sun and the Heliosphere as an Integrated System [PDF]

Highlights of Astronomy, 2005
AbstractWe summarize here the oral contributions given at the Joint Discussion (JD) 7The Sun and the Heliosphere as an Integrated System, held on July 17, 2003, in Sydney, as part of IAU XXV and give a list of posters presented at the JD.
Poletto, Giannina, Suess, Steven T.
openaire   +2 more sources

Mercury's Eccentric Orbit as a Driver of Significant “Seasonal” Change in Upstream Solar Wind Forcing

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Mercury experiences the most intense and variable solar wind (SW) conditions in the solar system due to its close, eccentric orbit about the Sun. In addition to variation driven by coronal source and solar cycle, the SW arriving at Mercury varies periodically as the planet's heliocentric distance changes by over 50% per orbit.
Ryan M. Dewey, Caitriona Mary Jackman, Mathias Rojo, Lina Z. Hadid, Beatriz Sánchez‐Cano, Charles F. Bowers, Jim M. Raines, Susan T. Lepri, Stefano Livi, Jesse T. Coburn, Sae Aizawa, Yeimy J. Rivera, Weijie Sun, Jiutong Zhao, James A. Slavin, Daniel Heyner, Daragh M. Hollman, Alexander D. Shane   +17 more
wiley   +1 more source

Plasma Stability in Turbulent Magnetic Flux Ropes Downstream of a Collisionless Shock

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract How pre‐existing solar wind turbulence, and coherent structures such as magnetic flux ropes within it, influence the transition of plasma across a shock is still poorly understood. Recently, in situ observations from the Earth's magnetosheath have been used to study plasma stability against ion kinetic instabilities. In the turbulent flow, the
L. Vuorinen, D. Burgess, F. Koller, D. Trotta   +3 more
wiley   +1 more source

Radial Evolution of Interplanetary Shock Properties with Heliospheric Distance: Observations from Parker Solar Probe

The Astrophysical Journal Letters
We present a comprehensive analysis of 66 interplanetary shocks observed by the Parker Solar Probe between 2018 November and 2024 January. Among these, 33 events fulfilled the Rankine–Hugoniot (R-H) conditions, ensuring reliable asymptotic plasma ...
Oksana Kruparova, Adam Szabo, Lan K. Jian, František Němec, Jana Šafránková, Zdeněk Němeček, Jacob Pasanen, Ayris Narock, Vratislav Krupar   +8 more
doaj   +1 more source

Comparing Solar Structure Detection Methods in SDO/AIA Observations and the Application to Raw Uncalibrated Data

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract Recent advances in solar physics increasingly rely on automated identification of coronal structures using machine learning. Yet most studies emphasize scientific performance without evaluating feasibility for onboard deployment to prioritize downlink observations.
P. Gonidakis, F. Carella, E. Dineva, H‐J. Jeong, P. Antunes, A. Podobas, S. Raptis, V. Toy‐Edens, M. Jin, S. Poedts, J. Magdalenic, G. Miloshevich   +11 more
wiley   +1 more source