Results 41 to 50 of about 31,874 (242)

Characteristics and energy dependence of recurrent galactic cosmic-ray flux depressions and of a forbush decrease with LISA Pathfinder [PDF]

open access: yes, 2018
The final publication is available at IOS Press through http://dx.doi.org/10.3847/1538-4357/aaa774Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by the solar activity, the solar polarity and structures of solar ...
Armano, M.   +6 more
core   +2 more sources

The Evolution of Autonomous Systems for Planetary Cave Exploration: A Review

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT The exploration of Subsurface Access Points (SAPs), such as lava tubes on the Moon and Mars, has gained significant interest due to their potential as stable environments shielded from surface radiation and temperature extremes. These sites are considered high‐value targets for detecting water and signs of ancient life, and assessing their ...
Sarah Swinton   +4 more
wiley   +1 more source

The θBn problem: Determination of local magnetic parameters of interplanetary shocks from in situ IMF data [PDF]

open access: yesGeofísica Internacional, 2001
The angle θBn is the angle between the upstream magnetic field and the shock normal direction and is important for many phenomena in interplanetary physics.
Andre Balogh   +1 more
doaj  

Relating Intermittency and Inverse Cascade to Stochastic Entropy in Solar Wind Turbulence

open access: yesThe Astrophysical Journal Letters, 2023
Turbulent energy transfer in nearly collisionless plasmas can be conceptualized as a scale-to-scale Langevin process. Hence, the statistics of magnetic field fluctuations can be embedded in the framework of stochastic process theory.
Mirko Stumpo   +5 more
doaj   +1 more source

4pi Models of CMEs and ICMEs

open access: yes, 2012
Coronal mass ejections (CMEs), which dynamically connect the solar surface to the far reaches of interplanetary space, represent a major anifestation of solar activity.
A. Kageyama   +108 more
core   +1 more source

Physical Processes and Models of Interplanetary Responses: Suggested Theoretical Studies [PDF]

open access: yesSymposium - International Astronomical Union, 1980
Three ways to improve the theory and therefore the understanding of the physical processes in the interplanetary medium (during both quiet and disturbed periods of solar activity) are suggested. They are: (1) the development and consequently the use of higher order moments (fluid) equations as well as of more realistic closure conditions and transport ...
openaire   +1 more source

Sampling, Mobility, and Anchoring in Small‐Body Sampling Robots: A Comprehensive Review

open access: yesSmartBot, EarlyView.
Small‐body sampling robots are exploration systems that perform contact, sampling, and stable operations on microgravity bodies such as asteroids and comets. The authors review representative robot architectures and key technologies, focusing on the mechanisms, evolution, and coupling of sampling, mobility, and anchoring.
Yurui Shen   +7 more
wiley   +1 more source

Spectral Properties of Suprathermal Protons Associated with Interplanetary Shocks from WIND/STICS Data

open access: yesThe Astrophysical Journal
Here are analyzed 3D velocity distribution functions (VDFs) of protons in the suprathermal energy-per-charge ( E / Q ) domain of 6.2 to 223.1 keV/e, as observed by the WIND Suprathermal Ion Composition Spectrometer (WIND/STICS) between 1995 and 2019 ...
Johann Rubens Mejia-Ott, Brent M. Randol
doaj   +1 more source

The plasma-solid transition: some implications in astrophysics [PDF]

open access: yesSerbian Astronomical Journal, 2002
Using a criterion proposed by Salpeter and standard solid-state physics, we have determined the Debye temperature of a solid in equilibrium with the electron gas surrounding it.
Čelebonović Vladan A., Dappen W.
doaj   +1 more source

Connecting speeds, directions and arrival times of 22 coronal mass ejections from the Sun to 1 AU

open access: yes, 2014
Forecasting the in situ properties of coronal mass ejections (CMEs) from remote images is expected to strongly enhance predictions of space weather, and is of general interest for studying the interaction of CMEs with planetary environments. We study the
Amla, K.   +17 more
core   +1 more source

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