Photospheric Magnetic Fields of the Trailing Sunspots in Active Region NOAA 12396

• Published in: arXiv.org
• Main Authors: Verma, M, Balthasar, H, Denker, C, Böhm, F, Fischer, C E, Kuckein, C, González Manrique, S J, Sobotka, M, N Bello González, Diercke, A, Berkefeld, T, Collados, M, Feller, A, Hofmann, A, Lagg, A, Nicklas, H, D Orozco Suárez, A Pastor Yabar, Rezaei, R, Schlichenmaier, R, Schmidt, D, Schmidt, W, Sigwarth, M, Solanki, S K, Soltau, D, Staude, J, Strassmeier, K G, Volkmer, R, O von der Lühe, Waldmann, T
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 28.08.2018
• Subjects: High resolution; Infrared spectra; Near infrared radiation; Photosphere; Solar activity; Solar magnetic field; Solar observatories; Sunspots
• ISSN: 2331-8422

The solar magnetic field is responsible for all aspects of solar activity. Sunspots are the main manifestation of the ensuing solar activity. Combining high-resolution and synoptic observations has the ambition to provide a comprehensive description of the sunspot growth and decay processes. Active region NOAA 12396 emerged on 2015 August 3 and was observed three days later with the 1.5-meter GREGOR solar telescope on 2015 August 6. High-resolution spectropolarimetric data from the GREGOR Infrared Spectrograph (GRIS) are obtained in the photospheric Si I \(\lambda\) 1082.7 nm and Ca I \(\lambda\)1083.9 nm lines, together with the chromospheric He I \(\lambda\)1083.0 nm triplet. These near-infrared spectropolarimetric observations were complemented by synoptic line-of-sight magnetograms and continuum images of the Helioseismic and Magnetic Imager (HMI) and EUV images of the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO).