Results 21 to 30 of about 1,700,755 (212)

The Soft X-Ray and EUV Spectra of Solar Flares [PDF]

open access: yesInternational Astronomical Union Colloquium, 1984
The Japanese solar maximum satellite HINOTORI was launched on 21 February 1981, and so far 720 Solar flares were detected including many large flares; the largest observed was a X12 class flare occurred on June 6, 1982. Unfortunately, the data recorder malfunctioned in June, 1982, since then the real time basis observation has been possible to continue.
K. Nishi, K. Tanaka
openaire   +1 more source

Solar flare particle acceleration in collapsing magnetic traps [PDF]

open access: yes, 2012
Electronic redacted version excludes material for which permission has not been granted by the rights holderThe topic of this thesis is a detailed investigation of different aspects of the particle acceleration mechanisms operating in Collapsing Magnetic
Grady, Keith J.
core   +2 more sources

Estimations of Elemental Abundances during Solar Flares Observed in Soft X-Rays by the MinXSS-1 CubeSat Mission

open access: yesThe Astrophysical Journal, 2023
Solar flares are complex phenomena emitting all types of electromagnetic radiation and accelerating particles on timescales of minutes, converting magnetic energy to thermal, radiative, and kinetic energy through magnetic reconnections.
Crisel Suarez, Christopher S. Moore
doaj   +1 more source

Characteristics of energetic solar flare electron spectra

open access: yesThe Astrophysical Journal, 1989
A 55 event survey of energy spectra of 0.1-100 MeV interplanetary electrons originating from solar flares as measured by two spectrometers onboard the ISEE 3 (ICE) spacecraft for the years 1978-1982 has been completed. Spectra generated using the maximum flux of a given event in each energy channel were restricted to events with a well-defined flux ...
Dan Moses   +3 more
openaire   +1 more source

Extreme ultraviolet imaging of three-dimensional magnetic reconnection in a solar eruption [PDF]

open access: yes, 2015
X.C., J.Q.S., M.D.D., Y.G., P.F.C. and C.F. are supported by NSFC through grants 11303016, 11373023, 11203014 and 11025314, and by NKBRSF through grants 2011CB811402 and 2014CB744203. C.E.P. and S.J.E. are supported by the UK STFC. J.Z.
Sun, J.Q.   +9 more
core   +1 more source

Temporal and spectral variations of the photoelectron flux and solar irradiance during an X class solar flare

open access: yesGeophysical Research Letters, 2008
Photoelectrons are the main energy source of airglow used to diagnose the state of the ionosphere‐thermosphere system. Because of measurement uncertainties and substantial gaps in the historical record, parameterized models of the EUV irradiance and ...
W. K. Peterson   +3 more
doaj   +1 more source

Three-dimensional spatial structures of solar wind turbulence from 10 000-km to 100-km scales [PDF]

open access: yes, 2011
Using the four Cluster spacecraft, we have determined the three-dimensional wave-vector spectra of fluctuating magnetic fields in the solar wind. Three different solar wind intervals of Cluster data are investigated for this purpose, representing ...
Narita, Y.   +15 more
core   +2 more sources

Time distributions of solar energetic particle events: Are SEPEs really random?

open access: yes, 2009
Solar energetic particle events (SEPEs) can exhibit flux increases of several orders of magnitude over background levels and have always been considered to be random innature in statistical models with no dependence of any one event on the occurrence of ...
Jiggens, P.T.A., Gabriel, S.B.
core   +1 more source

The investigation of quasi-separatrix layers in solar magnetic fields [PDF]

open access: yes, 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
core   +2 more sources

Particle acceleration in the presence of weak turbulence at an X-type neutral point [PDF]

open access: yes, 2012
We simulate the likely noisy situation near a reconnection region by superposing many 2D linear reconnection eigenmodes. The superposition of modes on the steady state X-type magnetic field creates multiple X- and O-type neutral points close to the ...
Petkaki, P.   +4 more
core   +1 more source

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