منابع مشابه
Granulation and magnetism in the solar atmosphere
The properties of the photosphere in magnetic and nonmagnetic regions, at two levels in the solar atmosphere, have been studied, using two virtually simultaneous time sequences of 109 mn duration of CCD images taken at the Vacuum Tower Telescope of the Sacramento Peak Observatory. The selected wavelengths correspond to the true continuum and to the wing of the MgIb1 line, where brightenings are...
متن کاملMeasuring the Hidden Aspects of Solar Magnetism
2008 marks the 100th anniversary of the discovery of astrophysical magnetic fields, when George Ellery Hale recorded the Zeeman splitting of spectral lines in sunspots. With the introduction of Babcock’s photoelectric magnetograph it soon became clear that the Sun’s magnetic field outside sunspots is extremely structured. The field strengths that were measured were found to get larger when the ...
متن کاملSolar Magnetism: The State of Our Knowledge and Ignorance
We review some longstanding scientific mysteries related to solar magnetism, with final attention to the mystery of the “turbulent diffusion” essential for the theoretical αω-dynamo that is believed to be the source of the magnetic fields of the Sun. Fundamental difficulties with the concept of turbulent diffusion of magnetic fields suggest that the solar dynamo problem needs to be reformulated...
متن کاملWaves and Magnetism in the Solar Atmosphere (WAMIS)
1 Space Science Division, Naval Research Laboratory, Washington, DC, USA, 2 Heliophysics Division, Science Mission Directorate, NASA, Washington, DC, USA, 3 High Altitude Observatory, Boulder, CO, USA, 4 Institut d’Astrophysique Spatiale, CNRS Université Paris-Sud, Orsay, France, 5 INAF National Institute for Astrophysics, Astrophysical Observatory of Torino, Pino Torinese, Italy, 6 Department ...
متن کاملThe Magnetism of the Solar Interior for a Complete Mhd Solar Vision
The solar magnetism is no more considered as a purely superficial phenomenon. The SoHO community has shown that the length of the solar cycle depends on the transition region between radiation and convection. Nevertheless, the internal solar (stellar) magnetism stays poorly known. Starting in 2008, the American instrument HMI/SDO and the European microsatellite PICARD will enrich our view of th...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 1908
ISSN: 0148-0227
DOI: 10.1029/te013i004p00145