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Solar Force-free Magnetic Fields [PDF]
Living Reviews in Solar Physics, 2012 The structure and dynamics of the solar corona is dominated by the magnetic field. In most areas in the corona magnetic forces are so dominant that all non-magnetic forces like plasma pressure gradient and gravity can be neglected in the lowest order ...
Thomas Wiegelmann, Takashi Sakurai
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Physics of the Earth and Planetary Interiors, 2011 This review provides an introduction to the generation and evolution of the Sun's magnetic field, summarising both observational evidence and theoretical models. The eleven year solar cycle, which is well known from a variety of observed quantities, strongly supports the idea of a large-scale solar dynamo.
Hood, Alan W., Hughes, David W.
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Rotational Components of the Sun’s Mean Field
The Astrophysical Journal, 2023 This paper uses wavelet transforms to look for the rotational frequencies of the Sun’s mean line-of-sight magnetic field. For a sufficiently high wavelet frequency, the spectra of the dipole, quadrupole, and hexapole field components each show a time ...
Neil R. Sheeley Jr.
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Small-Scale Solar Magnetic Fields [PDF]
Space Science Reviews, 2008 43 pages, 18 ...
de Wijn, A. +3 more
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Bipolar solar magnetic fields [PDF]
Astronomy & Astrophysics, 2015 Aims. Understanding magnetic fields in the solar corona is closely related to the complex nature of the often nonlinear differential equations describing such structures. Based on the ansatz of force-free fields, a class of solutions is derived and discussed that allows for axisymmetric bipolar magnetic fields. Methods.
R. C. Tautz, I. Lerche
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The Direct Effect of Toroidal Magnetic Fields on Stellar Oscillations: An Analytical Expression for the General Matrix Element [PDF]
, 2017 Where is the solar dynamo located and what is its modus operandi? These are still open questions in solar physics. Helio- and asteroseismology can help answer them by enabling us to study solar and stellar internal structures through global oscillations.
Kiefer, René +2 more
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Temporal Behaviors of Magnetic Helicity Injections by Self and Mutual Sunspot Rotations
The Astrophysical Journal, 2023 Magnetic helicity is a physical parameter used to quantify the complexity of magnetic fields, providing an indication of the energy state in the coronal magnetic structure.
Takahiro Hasegawa, Toshifumi Shimizu
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Convection and dynamo action in B stars [PDF]
, 2010 Main-sequence massive stars possess convective cores that likely harbor strong dynamo action. To assess the role of core convection in building magnetic fields within these stars, we employ the 3-D anelastic spherical harmonic (ASH) code to model ...
Augustson, Kyle C. +2 more
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Solar Coronal Magnetic Fields [PDF]
Symposium - International Astronomical Union, 1993 A short compilation of various radio methods of the determination of magnetic fields in the solar corona is given which, completed by observations in other spectral ranges (e.g. the optical and X-ray ranges), results in a complex picture of the magnetic field.
J. Hildebrandt, B. Kliem, A. Krüger
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