Magnetic helicity in multiply connected domains
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DOI: 10.1017/s0022377819000576
Abstract: Magnetic helicity is a fundamental quantity of magnetohydrodynamics that carries topological information about the magnetic field. By ‘topological information’, we usually refer to the linkage of magnetic field lines. For domains that are not simply… read more here.
Keywords: helicity multiply; multiply connected; topology; connected domains ... See more keywords
On magnetic helicity generation and transport in a nonlinear dynamo driven by a helical flow
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Plasma Physics"
DOI: 10.1017/s0022377820000690
Abstract: The relationship between nonlinear large-scale dynamo action and the generation and transport of magnetic helicity is investigated at moderate values of the magnetic Reynolds number ( $Rm$ ). The model consists of a helically forced,… read more here.
Keywords: generation transport; magnetic helicity; helicity generation; helicity ... See more keywords
Magnetic helicity evolution in a neutron star accounting for the Adler-Bell-Jackiw anomaly
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DOI: 10.1088/1475-7516/2018/08/021
Abstract: We analyze the role of the surface terms in the conservation law for the sum of the magnetic helicity density and the chiral imbalance of the charged particle densities. These terms are neglected in the… read more here.
Keywords: magnetic helicity; neutron star; surface terms; helicity ... See more keywords
Measuring stellar magnetic helicity density
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa297
Abstract: Helicity is a fundamental property of a magnetic field but to date it has only been possible to observe its evolution in one star – the Sun. In this paper, we provide a simple technique… read more here.
Keywords: helicity density; measuring stellar; density; stellar magnetic ... See more keywords