The dynamics of small-scale magnetic fields modulated by the solar cycle Article Swipe
M. Stangalini
,
G. Verth
,
V. Fedun
,
D. Perrone
,
M. Berretti
,
P. J. Bushby
,
S. Jafarzadeh
,
D. B. Jess
,
Fabio Giannattasio
,
P. H. Keys
,
R. Bruno
,
F. Berrilli
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2502.19011
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2502.19011
In addition to sunspots, which represent the most easily visualized manifestation of solar magnetism, cutting-edge observations of the solar atmosphere have uncovered a plethora of magnetic flux tubes, down to the resolving power of modern high-resolution telescopes (a few tens of km), revealing how the Sun is a fully magnetized star. These magnetic elements are advected and buffeted by ambient plasma flows and turbulent convection, resulting in perturbations of the flux tubes that make them natural conduits for channeling wave energy into the upper layers of the Sun's atmosphere and significantly contributing to the acceleration of the solar wind. Today, data acquired by the Helioseismic and Magnetic Imager (HMI) onboard NASA's Solar Dynamics Observatory (SDO), have made it possible to study the dynamics of small-scale magnetic fields over long timescales. Here, for the first time, we present the discovery of a modulation in the dynamical behavior of small-scale magnetic concentrations in the photosphere over temporal scales consistent with the solar activity cycle (i.e. 11 years), which has only been made possible by the long observing lifetime of the SDO/HMI spacecraft. Furthermore, a temporal varying polarization of their perturbations is also found on similar timescales. This demonstrates how the small-scale dynamics of magnetic fields are also affected by the global dynamo. These discoveries were realized through automated tracking of magnetic fields in the solar photosphere across 11 continuous years, resulting in the most extended statistical analyses of its kind so far, with more than 31 million magnetic concentrations examined.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2502.19011
- https://arxiv.org/pdf/2502.19011
- OA Status
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- https://openalex.org/W4416043606
All OpenAlex metadata
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https://openalex.org/W4416043606Canonical identifier for this work in OpenAlex
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https://doi.org/10.48550/arxiv.2502.19011Digital Object Identifier
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The dynamics of small-scale magnetic fields modulated by the solar cycleWork title
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preprintOpenAlex work type
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enPrimary language
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2025Year of publication
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2025-02-26Full publication date if available
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M. Stangalini, G. Verth, V. Fedun, D. Perrone, M. Berretti, P. J. Bushby, S. Jafarzadeh, D. B. Jess, Fabio Giannattasio, P. H. Keys, R. Bruno, F. BerrilliList of authors in order
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https://arxiv.org/abs/2502.19011Publisher landing page
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https://arxiv.org/pdf/2502.19011Direct link to full text PDF
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YesWhether a free full text is available
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2502.19011Direct OA link when available
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0Total citation count in OpenAlex
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