منابع مشابه
Magnetic 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...
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Stretching solar dynamos from differential rotation in a Riemannian manifold setting is presented. The spherical model follows closely a twisted magnetic flux tube Riemannian geometrical model or flux rope in solar physics, presented previously by Ricca [Solar Physics (1997)]. The spherical model presented here present new and interesting feature concerning its connection with spherical steady ...
متن کاملSolar rotation
This paper reviews current understanding of the internal rotation of the Sun. We summarise the outcome of the latest helioseismic measurements of the angular velocity profile, and review existing dynamical models of rotation in the convection zone and in the radiative zone beneath. Finally, we discuss preliminary results along a new line of investigation.
متن کاملThe Age – Activity – Rotation Relationship in Solar – Type Stars . ⋆
Measured from high–resolution spectra, we present Ca II K line chromospheric fluxes in 35 G dwarf stars of 5 open clusters to determine the age–activity–rotation relationship from the young Hyades and Praesepe (0.6 Gyr) to the old M 67 (∼ 4.5 Gyr) through the two intermediate age clusters IC 4651 and NGC 3680 (∼ 1.7 Gyr). The full amplitude of the activity index within a cluster is slightly abo...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2010
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921311015419