Results 51 to 60 of about 1,386,229 (221)

Electrons in the cosmic radiation [PDF]

, 1990
The nature of cosmic ray electrons and their radiation in the Universe has been studied. A convection associated diffusion model is proposed to describe the main characteristics of the large-scale distribution of cosmic ray electrons in the Galaxy: (1) a
Chi, Xinyu, Chi, X
core  

Radial Distribution of Electron Quasi-thermal Noise in the Outer Heliosphere

The Astrophysical Journal
Voyager 1 and 2 are only the two spacecraft that have arrived and passed through the heliospheric boundaries. Based on the plasma data from the Voyager 2 spacecraft, the electron quasi-thermal noise (QTN) is investigated by using of the electron ...
Yi-Lun Li, Ling Chen, Jin Wu De
doaj   +1 more source

Near‐Earth Cosmic Ray Modulation Index ϕ and Neutron Monitor Cutoff Rigidities at Hourly Cadence: Toward an Improved Monitoring of Solar‐Terrestrial Radiation Environment, Space Weather, and Space Climate

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Cosmic rays (CRs) are energetic particles originating from galactic and extragalactic sources. When arriving into the solar system and the Sun's heliosphere, they are diverted and modulated by the magnetic activity of the Sun. This modulation can be quantified by the modulation parameter ϕ $\phi $ determined with the Force‐field approximation (
Pauli Väisänen, Nicholas Larsen, Sergey Koldobskiy, Markus Similä, David Pelosi, Miguel Orcinha   +5 more
wiley   +1 more source

Plasma in astrophysics [PDF]

, 1982
Two examples of plasma phenomena of importance to astrophysics are reviewed. These are examples where astrophysical understanding hinges on further progress in plasma physics understanding. The two examples are magnetic reconnection and the collisionless
R.M. Kulsrud, Kulsrud, R.M.
core   +1 more source

Exploring the Complex Heliotail Boundary by an Extended Level Set Approach

The Astrophysical Journal Letters
There is an ongoing debate regarding the shape of the heliotail. Studies have shown that the heliotail may be “comet-like,” extending for thousands of au. Some previous works defined the heliopause using magnetohydrodynamic variables, which only serve as
C. Onubogu, M. Opher, M. Kornbleuth, G. Tóth, V. Florinski   +4 more
doaj   +1 more source

Plasma Physics Processes of the Interstellar Medium

, 2009
We discuss the outstanding issues of the interstellar medium which will depend on the application of knowledge from plasma physics. We particularly advocate attention to recent developments in experimental plasma physics, and urge that the astronomical community consider support of these experiments in the next decade.
Spangler, Steven, Haverkorn, Marijke, Intrator, Thomas, Kulsrud, Russell, Lazarian, Alex, Redfield, Seth, Zweibel, Ellen   +6 more
openaire   +2 more sources

Jovian Auroral Proton Precipitation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The total power of the Jovian aurora is about 1013–1014 W with ultraviolet emission observed in the Lyman and Werner bands of molecular hydrogen. X‐ray, radio, and infrared emissions have also been observed. The Jovian Auroral Distributions Experiment and the Jovian Energetic Particle Detector Instrument onboard the Juno spacecraft, orbiting ...
S. J. Houston, T. E. Cravens, O. Q. Hamil, J. H. Waite, D. R. Schultz   +4 more
wiley   +1 more source

The GBT Diffuse Ionized Gas Survey (GDIGS): Discrete Sources

The Astrophysical Journal, 2023
The Green Bank Telescope Diffuse Ionized Gas Survey (GDIGS) traces ionized gas in the Galactic midplane by observing radio recombination line (RRL) emission from 4 to 8 GHz. The nominal survey zone is 32.°3 > ℓ > −5°, ∣ b ∣ < 0.°5. Here, we analyze GDIGS
Dylan J. Linville, Matteo Luisi, L. D. Anderson, Bin Liu, T. M. Bania, Dana S. Balser, Trey V. Wenger, L. M. Haffner, J. L. Mascoop   +8 more
doaj   +1 more source

Compressible MHD Turbulence in Interstellar Plasmas

, 2001
19 pages, 2 figures, submitted to ...
Lithwick, Yoram, Goldreich, Peter
openaire   +2 more sources

Deterministic Propagation of Suprathermal Ions Through the Heliosphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The PEPSSI instrument onboard New Horizons is sampling the energy range that bridges pickup and suprathermal He+ ${\mathrm{H}\mathrm{e}}^{+}$ ions for the first time in the outer heliosphere. New Horizons repeatedly encountered structures beyond 30 au that we interpret as the spiral of a corotating interaction region (CIR) for an extended ...
P. Kollmann, E. C. Roelof, M. E. Hill, R. B. Decker, P. Brandt, R. L. McNutt Jr., P. S. Mostafavi, R. Nikoukar, J. W. Parker, K. N. Singer, J. Spencer, A. Stern, A. J. Verbiscer   +12 more
wiley   +1 more source