Fine Scale Magnetic Fields in and around a Decaying Active Region

TL;DR

This study uses high-resolution spectro-polarimetric data to analyze fine-scale magnetic structures in a decaying solar active region, revealing canopy-like features and opposite polarity loops.

Contribution

It provides detailed observations of magnetic fine structures and phenomena in a decaying active region using near-diffraction-limited data.

Findings

Presence of canopy-like structures in umbral dots and light bridges.

Detection of opposite polarity loops connecting to the main spot.

Evidence for field-free intrusion in the active region.

Abstract

High spatial resolution spectro-polarimetric observation of a decaying spot was observed with the Diffraction Limited Spectro-Polarimeter. The spatial resolution achieved was close to the diffraction limit (0."18) of the Dunn Solar Telescope. The fine scales present inside the decaying active region as well as surrounding areas were studied. Two interesting phenomenon observed are: (i) Canopy like structures are likely to be present in the umbral dots as well as in the light bridges providing evidence for field-free intrusion, (ii) There are opposite polarity loops present outside of the spot and some of them connects to the main spot and the surrounding magnetic features.