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| Paper: |
Moving Magnetic Features around a Pore |
| Volume: |
526, Solar Polarization Workshop 8 |
| Page: |
307 |
| Authors: |
Kaithakkal, A.; Riethmueller, T.; Solanki, S. K.; Lagg, A. |
| Abstract: |
Moving magnetic features (MMFs) are small-scale magnetic elements observed
to move radially outward from sunspots. Some studies have reported the
presence of MMFs around pores as well. We analyzed data from SunriseII/IMaX
observations obtained on 2013 June 12 between 23:39:10 and 23:55:37 UT.
IMaX scanned the Fe I 5250.225 Å spectral line at eight
wavelength positions and recorded the full Stokes vector at each of these
positions. The field of view covered a large pore (μ = 0.93) with pixel
scale of 0″.055. MMFs of opposite (positive) and same (negative) polarity as the pore were
observed to stream from the pore boundary.
We carried out a statistical analysis of the physical properties of MMFs
and the main results are:
1) the number of opposite polarity MMFs within 1.5 Mm from the pore
border, when they were first identified, is twice that of the same
polarity MMFs.
2) Only 11% of the chosen MMFs appear to be monopolar and they all have
the same polarity as the pore.
3) Majority of MMFs of both polarities move away from the pore border with
an average speed of 1.5 km/s. However, they do not always follow a smooth
radial track and some of them even move in tangential direction to the
pore.
4) MMFs of opposite polarity show a preferential up-flow whereas those of
the same polarity do not show any preference.
5) MMFs of both polarities are characterized by inclined fields.
This work, presented in an oral contribution at this Workshop,
has been published on The Astrophysical Journal Supplement Series
(Kaithakkal et al. 2017). |
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