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Propagation of cosmic rays (CRs) from their sources to the observer is described mainly as plain diffusion at high energies, while at lower energies there are other physical processes involved, both in the interstellar space and in the…

High Energy Astrophysical Phenomena · Physics 2017-01-11 S. Della Torre , M. Gervasi , D. Grandi , G. Johannesson , G. La Vacca , N. Masi , I. V. Moskalenko , E. Orlando , T. A. Porter , L. Quadrani , P. G. Rancoita , D. Rozza

Soil assessment is important for mobile robot planning and navigation on natural and planetary environments. Terramechanic characteristics can be inferred from the thermal behaviour of soils under the influence of sunlight using remote…

We briefly review sources of cosmic rays, their composition and spectra as well as their propagation in the galactic and extragalactic magnetic fields, both regular and fluctuating. A special attention is paid to the recent results of the…

High Energy Astrophysical Phenomena · Physics 2012-05-09 Felix Aharonian , Andrei Bykov , Etienne Parizot , Vladimir Ptuskin , Alan Watson

We study the change in cosmic-ray pressure, the change in cosmic-ray density, and the level of cosmic-ray induced heating via Alfven-wave damping when cosmic rays move from a hot ionized plasma to a cool cloud embedded in that plasma. The…

Astrophysics of Galaxies · Physics 2015-05-28 John E. Everett , Ellen G. Zweibel

Galactic winds constitute a primary feedback process in the ecology and evolution of galaxies. They are ubiquitously observed and exhibit a rich phenomenology, whose origin is actively investigated both theoretically and observationally.…

High Energy Astrophysical Phenomena · Physics 2022-07-13 Sarah Recchia

Context. The solar chromosphere is the interface between the solar surface and the solar corona. Modelling of this region is difficult because it represents the transition from optically thick to thin radiation escape, from gas-pressure…

Solar and Stellar Astrophysics · Physics 2015-12-09 Mats Carlsson , Viggo H. Hansteen , Boris V. Gudiksen , Jorrit Leenaarts , Bart De Pontieu

The complex interplay between the Solar Wind and the lunar surface serves as a quintessential example of space weathering. However, uncertainties persist regarding the influence of plasma originating from Earth's ionosphere, necessitating a…

Space Physics · Physics 2023-09-29 Suleiman Baraka , Sona Hosseini , Guillaume Gronoff , Lotfi Ben-Jaffel , Robert Ranking

In addition to sunspots, which represent the most easily visualized manifestation of solar magnetism, cutting-edge observations of the solar atmosphere have uncovered a plethora of magnetic flux tubes, down to the resolving power of modern…

Solar and Stellar Astrophysics · Physics 2025-02-27 M. Stangalini , G. Verth , V. Fedun , D. Perrone , M. Berretti , P. Bushby , S. Jafarzadeh , D. B. Jess , F. Giannattasio , P. H. Keys , R. Bruno , F. Berrilli

The arrival direction distribution of cosmic ray particles observed on Earth is shaped by the cumulative effects of their galactic source locations and of trajectory bending in the turbulent interstellar magnetic field. Coherent magnetic…

High Energy Astrophysical Phenomena · Physics 2019-08-02 J. C. Díaz-Vélez , Paolo Desiati

We present a novel method to search for structures of coherently aligned patterns in ultra-high energy cosmic-ray arrival directions simultaneously across the entire sky. This method can be used to obtain information on the Galactic…

Instrumentation and Methods for Astrophysics · Physics 2022-01-31 Marcus Wirtz , Teresa Bister , Martin Erdmann

The Earth's magnetosphere extension is controlled by the solar activity level via solar wind properties. Understanding such a relation in the Solar System is important for predicting also the condition of exoplanetary magnetospheres near…

The accuracy of astrometric observations conducted via a space-borne optical interferometer orbiting the Earth is expected to approach a few microarcseconds. Data processing of such extremely high-precision measurements requires access to a…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Sergei M. Kopeikin , N. V. Shuygina , M. V. Vasilyev , E. I. Yagudina , L. I. Yagudin

This article describes a data center hosting a web portal for accessing and sharing the output of large, cosmological, hydro-dynamical simulations with a broad scientific community. It also allows users to receive related scientific data…

Instrumentation and Methods for Astrophysics · Physics 2018-10-22 Antonio Ragagnin , Klaus Dolag , Veronica Biffi , Marionne Cadolle Bel , Nicolay J. Hammer , Aliaksei Krukau , Margarita Petkova , Daniel Steinborn

Extracting magnetic and thermodynamic information from spectropolarimetric observations is a difficult and time consuming task. The amount of science-ready data that will be generated by the new family of large solar telescopes is so large…

Solar and Stellar Astrophysics · Physics 2012-10-10 A. Asensio Ramos

We present the scientific case for a future space-based telescope aimed at very high spatial and temporal resolution imaging of the solar photosphere and chromosphere. Previous missions (e.g., HINODE, SUNRISE) have demonstrated the power of…

The transport environment for particles in the heliosphere, e.g. galactic cosmic rays (GCRs) and MeV electrons (including those originating from Jupiters magnetosphere), is defined by the solar wind flow and the structure of the embedded…

High Energy Astrophysical Phenomena · Physics 2013-09-06 P. Kühl , N. Dresing , P. Dunzlaff , H. Fichtner , J. Gieseler , R. Gómez-Herrero , B. Heber , A. Klassen , J. Kleimann , A. Kopp , M. Potgieter , K. Scherer , R. D. Strauss

Our understanding of processes occurring in the heliosphere historically began with reduced dimensionality - one-dimensional (1D) and two-dimensional (2D) sketches and models, which aimed to illustrate views on large-scale structures in the…

Cosmic rays are an important factor of space weather determining radiation conditions near the Earth and it seems to be essential to clarify radiation conditions near extrasolar planets too. Last year a terrestrial planet candidate was…

Solar and Stellar Astrophysics · Physics 2017-09-12 Alexei Struminsky , Andrei Sadovski , Anatoly Belov

The geographic South Pole provides unique opportunities to study cosmic particles in the Southern Hemisphere. It represents an optimal location to deploy large-scale neutrino telescopes in the deep Antarctic ice, such as AMANDA or IceCube.…

High Energy Astrophysical Phenomena · Physics 2024-05-21 D. Soldin , P. A. Evenson , H. Kolanoski , A. A. Watson

The solar atmosphere is full of complicated transients manifesting the reconfiguration of solar magnetic field and plasma. Solar jets represent collimated, beam-like plasma ejections; they are ubiquitous in the solar atmosphere and…

Solar and Stellar Astrophysics · Physics 2021-02-09 Yuandeng Shen