By L. Mestel (auth.), O. Havnes, B. R. Pettersen, J. H. M. M. Schmitt, J. E. Solheim (eds.)
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This e-book comprises the texts of the most lectures awarded on the NATO complex stories Institute on "Advances in guidance and homes of Stereoregular Polymers" held at Tirrenia close to Pisa, Italy, from October three to fourteen, 1978. a number of contributed papers have additionally been incorporated simply because they have been excited by subject matters no longer incorporated mainly lectures.
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For some simple, idealized configurations, the topology can be described by quantities relevant to the geometry in question; for example an axisymmetric fluxtube might be specified by the net twist as a function of radius. g. Priest 1982). Thus a useful measure of topological complexity should be applicable to arbitrary geometries. Helicity integrals provide one set of topological measures of universal applicability (Moffatt 1969; Berger and Field 1984). The great advantage of these integrals is that they are linear in the boundary motions.
Topological structure implies the existence of stress, currents, and free energy in the magnetic field. How does one measure the buildup of such topological structure? For some simple, idealized configurations, the topology can be described by quantities relevant to the geometry in question; for example an axisymmetric fluxtube might be specified by the net twist as a function of radius. g. Priest 1982). Thus a useful measure of topological complexity should be applicable to arbitrary geometries.
The first interesting result is that the strength of stellar magnetic fields appears to increase with (B-V), while the area coverage factor f is virtually independent of spectral type. More specifically, Saar (1986) finds that the magnetic field increases with (B-V) in such a way as to ensure an approximate equality between magnetic pressure and photospheric gas pressure. 63) the measured magnetic fields are Qn the order of =1500 G, as observed on the Sun, M dwarf flare stars may have magnetic fields as high as ..
Activity in Cool Star Envelopes by L. Mestel (auth.), O. Havnes, B. R. Pettersen, J. H. M. M. Schmitt, J. E. Solheim (eds.)