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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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Mapping solar magnetic fields from the photosphere to the base of the corona. [PDF]
Sci Adv, 2021 A novel space experiment achieves an unprecedented map of solar magnetic fields from the photosphere to the base of the corona. Routine ultraviolet imaging of the Sun’s upper atmosphere shows the spectacular manifestation of solar activity; yet, we ...
Ishikawa R +27 more
europepmc +3 more sources
The Magnetic Field in the Solar Atmosphere [PDF]
The Astronomy and Astrophysics Review, 2014 This publication provides an overview of magnetic fields in the solar atmosphere with the focus lying on the corona. The solar magnetic field couples the solar interior with the visible surface of the Sun and with its atmosphere. It is also responsible for all solar activity in its numerous manifestations.
Thomas Wiegelmann +2 more
arxiv +6 more sources
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.
David W. Hughes, A. W. Hood
openaire +5 more sources
Magnetic Fields in the Solar Convection Zone [PDF]
Living Reviews in Solar Physics, 2004 Recent studies of the dynamic evolution of magnetic flux tubes in the solar convection zone are reviewed with focus on emerging flux tubes responsible for the formation of solar active regions. The current prevailing picture is that active regions on the
Fan Yuhong
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Measurements of Solar Magnetic Fields [PDF]
The Astrophysical Journal, 1966 The photographic technique of Leighton (1) has been used to obtain high resolution measurements of photospheric magnetic fields with the following chief results: 1. "Source fluxes", Φ(defined as the average of the absolute values of the total fluxes of positive and negative polarity in a bipolar magnetic region on the day when this average is largest),
N. Sheeley
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On Azimuthal Solar Magnetic Fields.
The Astrophysical Journal, 1956 V. C. A. Ferraro, P.C. Kendall
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Reconstructing solar magnetic fields from historical observations [PDF]
Astronomy & Astrophysics, 2019 Context. Systematic observations of magnetic field strength and polarity in sunspots began at Mount Wilson Observatory (MWO), USA in early 1917. Except for a few brief interruptions, this historical dataset has continued until the present. Aims.
A. Pevtsov +9 more
semanticscholar +1 more source
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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The solar magnetic field [PDF]
Reports on Progress in Physics, 2006 The magnetic field of the Sun is the underlying cause of the many diverse phenomena combined under the heading of solar activity. Here we describe the magnetic field as it threads its way from the bottom of the convection zone, where it is built up by the solar dynamo, to the solar surface, where it manifests itself in the form of sunspots and faculae,
Bernd Inhester +2 more
openaire +4 more sources