Results 81 to 90 of about 401,654 (242)
DRIFT EFFECTS ON THE GALACTIC COSMIC RAY MODULATION
The Astrophysical Journal, 2014 Cosmic ray (CR) modulation is driven by both solar activity and drift effects in the heliosphere, although their role is only qualitatively understood as it is difficult to connect the CR variations to their sources. In order to address this problem, the Empirical Mode Decomposition technique has been applied to the CR intensity, recorded by three ...
Monica Laurenza +4 more
openaire +2 more sources
Collisionless Shocks: Contemporary State After Three Quarters of a Century of Research
Reviews of Geophysics, Volume 64, Issue 3, September 2026.Abstract The collisionless shock research started in the late 1950s. Since then, plenty of data have been accumulated due to the large number of missions in the heliosphere, providing in situ measurements of the fields and particles. The quality of these measurements has vastly improved, especially in the last two decades.
M. Gedalin +2 more
wiley +1 more source
Computer modeling and experimental work on the astrobiological implications of the martian subsurface ionising radiation environment [PDF]
, 2008 Any microbial life extant in the top meters of the martian subsurface is likely to be held dormant for long periods of time by the current permafrost conditions.
Dartnell, Lewis R, Dartnell, L.R.
core
, 2014 International audienceIn this contribution, we discuss the transition from galactic to extragalactic cosmic-rays and its implications for the highest energy galactic cosmic-rays.
Denis Allard, Allard, Denis
core +1 more source
Radial intensity gradients of galactic cosmic rays in the heliosphere at solar maximum: 1D no-shock simulation [PDF]
Geofísica Internacional, 2009 We study the spatial distribution of galactic cosmic rays in the heliosphere at solar maximum of cycles 21, 22 and 23, using a one-dimensional no-shock model of the cosmic ray transport equation.
R. A. Caballero-Lopez +1 more
doaj
Radio Science, Volume 61, Issue 9, September 2026.Abstract Trans‐ionospheric high frequency (HF: 3–30 MHz) response to atmospheric gravity waves (GWs) is studied in the middle‐latitude ionosphere in relation to thunderstorm activity. SuperDARN HF radar observations are compared against the model simulations to quantify the impact of GW‐generated medium‐scale traveling ionospheric disturbances (MSTID ...
S. Chakraborty +5 more
wiley +1 more source
Space Weather, Volume 24, Issue 9, September 2026.Abstract This study presents a survey of high‐latitude ionospheric scintillation using GNSS radio occultation (RO) data from the PlanetiQ satellite. The analysis examines 483 high‐latitude RO tracks between January and May 2023, with 371 tracks exhibiting scintillation events.
Margaret W. Chen +6 more
wiley +1 more source
Direct Measurements of Galactic Cosmic Rays
, 2023 This paper reviews recent progress in the field of direct measurements of Galactic cosmic rays. High-statistic measurements of cosmic ray energy spectra, chemical and isotopic composition, and the rare antimatter components have been made using large ...
Tomassetti, Nicola
core +1 more source
The Astrophysical JournalIn astrophysics, one significant challenge lies in understanding the acceleration of cosmic rays, which leads to the occurrence of a power law. In this article, momentum transport generated by the combined effects of pitch-angle diffusion and background ...
J.-F. Wang, G. Qin
doaj +1 more source
Astronomy & AstrophysicsContext. Ionisation controls the chemistry, thermal balance, and magnetic coupling in protoplanetary discs. However, standard ionisation vectors such as stellar UV, X-rays, Galactic cosmic rays might not be efficient enough, as UV/X-rays are attenuated ...
Brunn V. +5 more
doaj +1 more source