A helicity proxy from horizontal solar flow patterns
نویسندگان
چکیده
منابع مشابه
Helicity of Solar Active Regions from a Dynamo Model
We calculate helicities of solar active regions based on the idea that poloidal flux lines get wrapped around a toroidal flux tube rising through the convection zone, thereby giving rise to the helicity. Rough estimates based on this idea compare favorably with the observed magnitude of helicity. We use our solar dynamo model based on the Babcock-Leighton a-effect to study how helicity varies w...
متن کاملMagnetic Helicity Generation by Solar Differential Rotation
Observations of sunspots, active regions, filaments, coronal arcades, and interplanetary magnetic clouds indicate that the Sun preferentially exhibits left-handed, negative-helicity features in its northern hemisphere, and their opposite counterparts in the south, independent of sunspot cycle. We investigate quantitatively the generation of magnetic helicity by solar differential rotation actin...
متن کاملMagnetic Helicity and Energy Spectra of a Solar Active Region
We compute magnetic helicity and energy spectra of the solar active region NOAA 11158 during 11–15 February 2011 at 20 southern heliographic latitude using observational photospheric vector magnetograms. We adopt the isotropic representation of the Fourier-transformed two-point correlation tensor of the magnetic field. The sign of magnetic helicity turns out to be predominantly positive at all ...
متن کاملReverse Proxy Patterns
Overview Implementing an application-level server-side proxy 1 [GHJV95][POSA96] can result in a large number of positive consequences. However, the aspects of network security, single sign on and integration imply different forces upon such a reverse proxy. Attaching the surrounding infrastructure can show additional roadblocks for a successful deployment. The following patterns try to structur...
متن کاملFlow Pattern Identification and Pressure Drop Calculation for Gas-Liquid Flow in a Horizontal Pipeline
Two phase gas-liquid flow pattern in a horizontal pipeline is predicted very accurately using a newly-developed analytical relation. The pattern identification is based on one of the most widely used graphs, the Baker diagram, modified in a way that compensates for the unrealistic oversimplifications of recent works. The Kern's method of pressure drop calculation is used to obtain the frict...
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: Astronomische Nachrichten
سال: 1999
ISSN: 0004-6337,1521-3994
DOI: 10.1002/1521-3994(199907)320:3<135::aid-asna135>3.0.co;2-7