منابع مشابه
Particle acceleration in solar flares: observations versus numerical simulations
Solar flares are generally agreed to be impulsive releases of magnetic energy. Reconnection in dilute plasma is the suggested trigger for the coronal phenomenon. It releases up to 1026 J, accelerates up to 1038 electrons and ions and must involve a volume that greatly exceeds the current sheet dimension. The Ramaty High-Energy Solar Spectroscopic Imager satellite can image a source in the coron...
متن کاملObservations and modelling of Helium lines in solar flares
We explore the response of the He ii 304 Å and He i 584 Å line intensities to electron beam heating in solar flares using radiative hydrodynamic simulations. Comparing different electron beams parameters, we found that the intensities of both He lines are very sensitive to the energy flux deposited in the chromosphere, or more specifically to the heating rate, with He ii 304 Å being more sensit...
متن کاملMassively Parallel Simulations of Solar Flares and Plasma Turbulence
c © 2007 by John von Neumann Institute for Computing Permission to make digital or hard copies of portions of this work for personal or classroom use is granted provided that the copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise requires prior specific permission by the publisher ment...
متن کاملThe Standard Solar Model vs. Experimental Observations
A historical summary of observations since 1960 raises questions about the standard solar model (SSM). The SSM ascribes luminosity to hydrogen fusion in the solar core. It assumes the Sun formed suddenly without mass accretion so its interior had the same composition as its surface. The lightest element, hydrogen, accounts for over 90 percent of the atoms in the Sun’s atmosphere. The next light...
متن کاملMillimeter Observations of Flares
The nature of emission from solar ares at millimeter wavelengths is discussed. In the impulsive phase of ares, millimeter emission should be dominated by gyrosynchrotron emission from MeV{energy electrons. Millimeter telescopes are very sensitive to these electrons and can make high{resolution images of their sources for comparison with HESSI images, allowing us to investigate the behaviour of ...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2010
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921311006880