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- Anvar Shukurov, Rodion Stepanov, Dmitry D Sokoloff
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2008

We demonstrate that flows of conducting fluid along a MÃ¶bius strip and related surfaces are hydromagnetic dynamos, i.e., they can produce an exponentially growing magnetic field from an infinitesimalâ€¦ (More)

Observational evidence for dynamo action in spiral galaxies is reviewed, and the capabilities of various theories in explaining the basic features of galactic magnetic fields are discussed.â€¦ (More)

- Ruy Carlos Ruver Beck, A. Fletcher, +5 authors V. Shoutenkov
- 2005

We present Î»3.5 cm and Î»6.2 cm radio continuum maps in total and polarized intensity of the barred galaxies NGC 1097 (at 2 â€²â€² â€“15 â€²â€² resolution) and NGC 1365 (at 9 â€²â€² â€“25 â€²â€² resolution). A previouslyâ€¦ (More)

We present a mathematical model, based on the compilation and statistical processing of radiocarbon dates, of the transition from the Mesolithic to the Neolithic, from about 7,000 to 4,000 BC inâ€¦ (More)

- Sharanya Sur, Anvar Shukurov, Kandaswamy Subramanian
- 2006

We present a simple semi-analytical model of nonlinear, mean-field galactic dynamos and use it to study the effects of various magnetic helicity fluxes. The dynamo equations are reduced using theâ€¦ (More)

We show that radial flows (directed either inward or outward) suppress mean-field dynamo action in a thin disc. Under conditions typical of spiral galaxies, the reduction in the growth rate of theâ€¦ (More)

The configuration of the regular magnetic field in M 31 is deduced from radio polarization observations at the wavelengths Î»Î» 6, 11 and 20 cm. By fitting the observed azimuthal distribution ofâ€¦ (More)

The thin-disc global asymptotics are discussed for axisymmetric meanfield dynamos with vacuum boundary conditions allowing for non-local terms arising from a finite radial component of the meanâ€¦ (More)

We analyze statistically representative samples of radiocarbon dates from key Early Neolithic sites in Central Europe belonging to the Linear Pottery Ceramic Culture (LBK), and of pottery-bearingâ€¦ (More)

We discuss, using simple analytical models and MHD simulations, the origin and parameters of turbulence and magnetic fields in galaxy clusters. Any pre-existing tangled magnetic field must decay in aâ€¦ (More)