منابع مشابه
The Strength of Quiet Sun Magnetic Fields
We present new quantitative measurements of magnetic fields on the quiet Sun. The object was (a) to measure magnetic field strengths, and (b) to test the “kilogauss model,” which posits that the apparently weak fields are actually subtelescopic knots of kilogauss fields with small filling factors. We used a new arrangement we call the spectro-videomagnetograph (SPVMG), which applies the videoma...
متن کاملThe Magnetism of the Very Quiet Sun
When the polarimetric sensitivity and the angular resolution exceed a threshold, magnetic fields show up almost everywhere on the solar surface. Here I revise the observational properties of the weakest polarization signals, which appear in the InterNetwork (IN) regions. We already have some information on the magnetic field strengths and inclinations, mass motions, lifetimes, magnetic fluxes, ...
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15 صفحه اولThe quiet-Sun photosphere and chromosphere.
The overall structure and the fine structure of the solar photosphere outside active regions are largely understood, except possibly the important roles of a turbulent near-surface dynamo at its bottom, internal gravity waves at its top and small-scale vorticity. Classical one-dimensional static radiation-escape modelling has been replaced by three-dimensional time-dependent magento-hydrodynami...
متن کاملEUV brightness variations in the quiet Sun
The Coronal Diagnostic Spectrometer (CDS) onboard the SOHO satellite has been used to obtain movies of quiet Sun regions at disc centre. These movies were used to study brightness variations of solar features at three different temperatures sampled simultaneously in the chromospheric He I 584.3 Å (2·104 K), the transition region O V 629.7 Å (2.5·105 K) and coronal Mg IX 368.1 Å (106 K) lines. I...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1960
ISSN: 0074-1809
DOI: 10.1017/s0074180900104358