Fine Scale Magnetic Fields in and Around a Decaying Active Region

Details Fine Scale Magnetic Fields in and Around a Decaying Active Region Fine Scale Magnetic Fields in and Around a Decaying Active Region

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ihy..worke..27s&link_type=abstract

2nd UN/NASA Workshop on International Heliophysical Year and Basic Space Science. Proceedings of the conference held 27 Novembe

Astronomy and Astrophysics

Astrophysics

Scientific paper

A very high resolution spectro-polarimetric observation of a decaying spot was observed with the Diffraction Limited Spectro-Polarimeter (DLSP). The spatial resolution achieved in this observation is close to the diffraction limit (0.18arcsec) of the Dunn Solar Telescope operated by the National Solar Observatory at Sacramento Peak, Sunspot, New Mexico. The fine scales present inside the decaying active region as well as surrounding areas of the active region will be presented. There are two interesting phenomenon observed which will be described in detail. They are: (i) There are opposite polarity loops present all around the spot and some of them do connect the main spot and the surrounding magnetic features, (ii) Canopy like structures are likely to be present in the umbral dots as well as in the light bridges present providing evidence for field-free intrusion. The conclusion from the time variation of the intensity structures of this spot is that the spot is disrupted in to several fragments by the formation of light bridges and the fragmented magnetic fields later disappear under the visible photosphere.

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