Results 111 to 120 of about 2,789 (225)
A density-temperature description of the outer electron radiation belt during geomagnetic storms [PDF]
, 2009 Bi-Maxwellian fits are made to energetic-electron flux measurements from seven satellites in geosynchronous orbit, yielding a number density (n) and temperature (T) description of the outer electron radiation belt.
Denton, Michael H. +5 more
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Radial evolution of cross helicity in high-latitude solar wind
, 2005 We employ a turbulence transport theory to explain the high-latitude radial evolution of cross helicity, or Alfvénicity, observed by the Ulysses spacecraft.
Matthaeus, William H. +6 more
core +1 more source
The Astrophysical JournalMagnetic reconnection and magnetohydrodynamic waves may well be both playing a role in coronal heating. In this paper, we simulate reconnection in the corona as a response to the convergence of opposite-polarity magnetic sources at the base of the corona.
Sripan Mondal +3 more
doaj +1 more source
The investigation of quasi-separatrix layers in solar magnetic fields
, 2011 The structure of the magnetic field is often an important factor in many energetic processes in the solar corona. To determine the topology of the magnetic field features such as null points, separatrix surfaces, and separators must be found.
Restante, Anna Lisa
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A Unified Picture of Swirl-driven Solar Coronal Heating: Magnetic Energy Supply and Dissipation
The Astrophysical Journal LettersThe coronal heating problem is one of the most critical challenges in solar physics. Recent observations have revealed that small-scale swirls are ubiquitous in the photosphere and chromosphere, suggesting that they may play a significant role in ...
Hidetaka Kuniyoshi +2 more
doaj +1 more source
Wave propagation, phase mixing and dissipation in Hall MHD
, 2012 In this thesis the effect of the Hall term in the generalised Ohm’s law on Alfvén (shear) and fast wave propagation and dissipation in the ion cyclotron frequency range is investigated.
Threlfall, James W.
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Reduced Thermal Conduction in Solar Coronal Loops
The Astrophysical JournalThermal conduction plays an important role in the energy balance of the solar coronal plasma. In this paper, we present a new method for deriving observational constraints on the density–temperature relationship for coronal loops from the differential ...
M. Asgari-Targhi, A. A. van Ballegooijen
doaj +1 more source
The Uniturbulence and Alfvén Wave Solar Model (UAWSoM) in MPI-AMRVAC
Astronomy & AstrophysicsContext. The coronal heating problem and the generation of the solar wind remain fundamental challenges in solar physics. While approaches based on, e.g., the Alfvén Wave Solar Model (AWSoM) have proven highly successful in reproducing the large-scale ...
McMurdo M. +4 more
doaj +1 more source
The propagation and damping of slow magnetoacoustic waves in the solar atmosphere
, 2012 The propagation and damping of slow magnetoacoustic waves in the solar atmosphere is investigated, with particular emphasis placed on waves with periodicities of five minutes. The basic model of a uniform temperature loop is extended by the addition of
Owen, Nicholas Robert
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Large Scale Properties of Coronal Heating along the Solar Cycle [PDF]
, 2010 We discuss various studies of the global properties of coronal heating. Some of them find power laws tying the X-ray luminosity with the magnetic flux of individual structures, of the whole Sun, and of active solar-type stars. Others are based on methods
Orlando, S +3 more
core