Results 91 to 100 of about 10,278 (236)

Warm Breeze from the starboard bow: a new population of neutral helium in the heliosphere

, 2014
We investigate the signals from neutral He atoms observed from Earth orbit in 2010 by IBEX. The full He signal observed during the 2010 observation season can be explained as a superposition of pristine neutral interstellar He gas and an additional ...
Alexashov, D. B., Bzowski, M., Fuselier, S. A., Grzedzielski, S., Izmodenov, V. V., Kubiak, M. A., Leonard, T., McComas, D. J., Moebius, E., Sokół, J. M., Swaczyna, P., Wurz, P.   +11 more
core   +1 more source

Periodic Density Structures Observed in Ulysses Data: First Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Periodic density structures (PDSs) are advecting quasi‐periodic (periodicities between several minutes and several hours) density enhancements observed in the solar wind and corona. There is strong evidence that PDSs are formed at the Sun.
Brent M. Randol, Nicholeen Viall, Larry Kepko, Simone Di Matteo   +3 more
wiley   +1 more source

Variability of East–West Asymmetry in Energetic Storm Particle Intensities and Coronal Mass Ejection Deflection during Solar Cycles 23 and 24

The Astrophysical Journal
We investigate the variability of the east–west asymmetry in energetic storm particle (ESP) heavy ion intensities at interplanetary shocks driven by coronal mass ejections (CMEs) during solar cycles (SCs) 23 and 24.
A. Santa Fe Dueñas, R. W. Ebert, Gang Li, Zheyi Ding, M. A. Dayeh, M. I. Desai, L. K. Jian, N. Lugaz, B. Zhuang, N. Al-Haddad   +9 more
doaj   +1 more source

Characterizing the Signals and Backgrounds in a Low Earth Orbiting Cherenkov Detector, and Background Mitigation Strategies

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Cherenkov detectors have been used in space for decades to measure Galactic Cosmic Rays (GCRs), Solar Energetic Particles (SEPs) and trapped particles. We present proof‐of‐concept GRAS/Geant4 simulations to both show that a cubic fused silica Cherenkov detector with SiPM in LEO has a good sensitivity to SEP and GCR protons as a function of cut‐
C. S. W. Davis, F. Lei, K. Ryden, C. Dyer, G. Santin, P. Jiggens, M. Heil   +6 more
wiley   +1 more source

Development of a coronal mass ejection arrival time forecasting system using interplanetary scintillation observations

, 2019
Coronal mass ejections (CMEs) cause disturbances in the environment of the Earth when they arrive at the Earth. However, the prediction of the arrival of CMEs still remains a challenge.
Den, Mitsue, Fujiki, Kenichi, Iwai, Kazumasa, Kubo, Yûki, Shiota, Daikou, Tokumaru, Munetoshi   +5 more
core   +1 more source

On the Freeze‐In Distance of Solar Wind Fluid Entropy Variability in the Corona

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract The strong correlation between solar wind entropy and the frozen‐in ion charge state ratio O7+/O6+ ${\mathrm{O}}^{7+}/{\mathrm{O}}^{6+}$ indicates that entropy variability on timescales of hours or longer is preserved from its solar source. This prompts the question: where in the solar atmosphere does this entropy variability come from, and at
Aidan J. Nakhleh, Nicholeen M. Viall, Susan T. Lepri, Jim M. Raines   +3 more
wiley   +1 more source

Toward Explaining Galactic Cosmic-Ray Modulation in a Dynamic Heliosheath: Transient Structures Seem Dominant and Magnetic Drifts Appear Reduced

The Astrophysical Journal
While traveling through the heliosheath (HS), Voyager 2 observed sustained flux depletions of galactic cosmic rays (GCRs) on scales of months to years.
J. G. Alonso Guzmán, V. Florinski, L.-L. Zhao, A. C. Cummings, B. C. Heikkila, M. E. Hill, R. Nikoukar, M. Opher   +7 more
doaj   +1 more source

A possible generation mechanism for the IBEX ribbon from outside the heliosphere

, 2010
The brightest and most surprising feature in the first all-sky maps of Energetic Neutral Atoms (ENA) emissions (0.2-6 keV) produced by the Interstellar Boundary Explorer (IBEX) is an almost circular ribbon of a ~140{\deg} opening angle, centered at (l,b)
Bzowski, M., Czechowski, A., Funsten, H. O., Grzedzielski, S., McComas, D. J., Schwadron, N. A.   +5 more
core   +1 more source

The Gradual Slowing of the Solar Wind in the Outer Heliosphere

The Astrophysical Journal
The solar wind gradually slows with increasing distance from the Sun as interstellar material becomes ionized and picked up by the solar wind. When observing the solar wind in the outer heliosphere, it is difficult to differentiate temporal decreases in ...
Heather A. Elliott, Tae K. Kim, John D. Richardson, Justyna M. Sokół, Bishwas L. Shrestha, Eric J. Zirnstein, David J. McComas, Paweł Swaczyna, Merav Opher, Maher A. Dayeh, Matthew E. Hill, Andrew Poppe, S. Alan Stern, Pontus C. Brandt, Kelsi Singer, Joel Parker, Anne J. Verbiscer, New Horizons Heliophysics Team   +17 more
doaj   +1 more source

Longitudinal distribution of cosmic rays in the heliosphere [PDF]

The longitudinal distribution of cosmic ray intensity was examined during the years 1974-1976 when the persistent high speed solar wind stream structures produced a well ordered inner heliosphere.
Gold, R. E., Venkatesan, D.
core   +1 more source