Flows in and around active region NOAA12118 observed with the GREGOR solar telescope and SDO/HMI

TL;DR

This study utilizes high-resolution GREGOR solar telescope data combined with SDO observations to analyze 3-D flow fields and magnetic activity in active region NOAA 12118, enhancing understanding of sunspot formation and decay.

Contribution

It presents new high-resolution imaging spectroscopy data of NOAA 12118, enabling detailed analysis of flow fields and magnetic evolution in active regions.

Findings

Identification of horizontal proper motions in NOAA 12118

Insights into the evolution of magnetic and velocity fields

Comparison between GREGOR and SDO data enhances analysis

Abstract

Accurate measurements of magnetic and velocity fields in and around solar active regions are key to unlocking the mysteries of the formation and the decay of sunspots. High spatial resolution image and spectral sequences with a high cadence obtained with the GREGOR solar telescope give us an opportunity to scrutinize 3-D flow fields with local correlation tracking and imaging spectroscopy. We present GREGOR early science data acquired in 2014 July - August with the GREGOR Fabry-P\'erot Interferometer and the Blue Imaging Channel. Time-series of blue continuum (? 450.6 nm) images of the small active region NOAA 12118 were restored with the speckle masking technique to derive horizontal proper motions and to track the evolution of morphological changes. In addition, high-resolution observations are discussed in the context of synoptic data from the Solar Dynamics Observatory.