Background-Subtracted Solar Activity Maps
Solar Physics, ISSN: 1573-093X, Vol: 294, Issue: 6
2019
- 8Citations
- 2Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
We introduce the concept of a Background-subtracted Solar Activity Map (BaSAM) as a new quantitative tool to assess and visualize the temporal variation of the photospheric magnetic field and the UV λ160 nm intensity. The method utilizes data of the Solar Dynamics Observatory (SDO) and is applicable to both full-disk observations and regions-of-interest. We illustrate and discuss the potential of BaSAM resorting to datasets representing solar minimum and maximum conditions: i) Contributions of quiet-Sun magnetic fields, i.e. the network and (decaying) plage, to solar activity can be better determined when their variation is measured with respect to the background given by “deep” magnetograms. ii) Flaring and intermittent brightenings are easily appraised in BaSAMs of the UV intensity. iii) Both magnetic-field and intensity variations demonstrated that the flux system of sunspots is well connected to the surrounding supergranular cells. In addition, producing daily full-disk BaSAMs for the entire mission time of SDO provides a unique tool to analyze solar cycle variations, showing how vigorous or frail the variations of magnetic-field and intensity features are.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85066952721&origin=inward; http://dx.doi.org/10.1007/s11207-019-1459-x; http://link.springer.com/10.1007/s11207-019-1459-x; http://link.springer.com/content/pdf/10.1007/s11207-019-1459-x.pdf; http://link.springer.com/article/10.1007/s11207-019-1459-x/fulltext.html; https://dx.doi.org/10.1007/s11207-019-1459-x; https://link.springer.com/article/10.1007/s11207-019-1459-x
Springer Science and Business Media LLC
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