Elemental composition of solar energetic particles
نویسندگان
چکیده
منابع مشابه
The Coronal Isotopic Composition as Determined Using Solar Energetic Particles
Solar energetic particles (SEPs), like the solar wind, provide a direct sample of the Sun. Although SEP abundances show a variable amount of mass fractionation, it is possible to develop methods of correcting for it in order to deduce the composition of the corona. Using high-resolution measurements from the Solar Isotope Spectrometer on the Advanced Composition Explorer, we have studied the is...
متن کاملSolar flares and energetic particles.
Solar flares are now observed at all wavelengths from γ-rays to decametre radio waves. They are commonly associated with efficient production of energetic particles at all energies. These particles play a major role in the active Sun because they contain a large amount of the energy released during flares. Energetic electrons and ions interact with the solar atmosphere and produce high-energy X...
متن کاملAcceleration and Propagation of Solar Energetic Particles
The acceleration of electrons and charged nuclei to high energies is a phenomenon occuring at many astrophysical sites throughout the universe. In the heliosphere, processes in the solar corona associated with flares and coronal mass ejections (CMEs) are the most energetic natural particle accelerators, sometimes accelerating electrons and ions to relativistic energies. The observation of these...
متن کاملAcceleration of solar energetic particles: the case of solar (ares
Solar energetic particles are believed to originate from two di*erent sources, solar (ares and coronal mass ejections. These two sources are the most energetic particle accelerators in the heliosphere, as they can accelerate electrons from 10 keV to a few MeV and protons from a few MeV to a few GeV. In this contribution, we restrict our presentation to the case of solar (ares, by reviewing the ...
متن کاملTime Evolution of Elemental Ratios in Solar Energetic Particle Events
Heavy ion ratio abundances in Solar Energetic Particle (SEP) events, e.g. Fe/O, often exhibit decreases over time. Using particle instruments on the ACE, SOHO and STEREO spacecraft, we analysed heavy ion data from 4 SEP events taking place between December 2006 and December 2014. We constructed 36 different ionic pairs and studied their time evolution in each event. We quantified the temporal b...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1984
ISSN: 0004-637X,1538-4357
DOI: 10.1086/161953