High speed magnetized flows in the quiet Sun
نویسندگان
چکیده
منابع مشابه
Parallel Asynchronous Simulations of High-Speed Magnetized Plasma Flows
Recent advances in computer technology and numerical algorithms have made it possible to model strongly kinetic parts of the Earth’s outer magnetosphere with hybrid and particle-in-cell codes. The critical issue in global magnetospheric simulations is efficient handing of disparate temporal scales which naturally arise in various regions of a large computational domain. Modern quasi-neutral hyb...
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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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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...
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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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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 Classical one-dimensional static radiation-escape modelling has been replaced by three-dimensional time-dependent magento-hydrodynami...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2014
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201424131