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THE UBIQUITOUS PRESENCE OF LOOPLIKE FINE STRUCTURE INSIDE SOLAR ACTIVE REGIONS

  • Authors: Y.-M. Wang

2016 The Astrophysical Journal Letters 820 L13.

  • Provider: AAS Journals

Caption: Figure 1.

Looplike fine structure embedded within moss/plage in NOAA 12235, which was located at S08° and crossed central meridian on 2014 December 15. Left column: AIA Fe IX 17.1 nm images recorded at 13:06:59 (December 14), 02:39:35 (December 15), and 18:19:35 UT (December 15). Middle column: corresponding Fe XII 19.3 nm images recorded at 13:06:57, 02:39:30, and 18:19:30 UT. Right column: corresponding HMI line-of-sight magnetograms recorded at 13:07:09, 02:39:24, and 18:19:54 UT, and saturated at ±20 G. Here and in subsequent figures, north is up and west is to the right. Most of the looplike features inside the circled areas (which have radius 20″ or 14.3 Mm) seem to have both legs located within the negative-polarity plage. (Arrows indicate two of the largest such features.) The “moving magnetic features” impinging on the plage from the leader sunspot to the southwest may be one possible source of undetected minority-polarity flux.

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