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19 April 2024

» arxiv » 1603.1109

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Flows in and around active region NOAA12118 observed with the GREGOR solar telescope and SDO/HMI
M. Verma ; C. Denker ; H. Balthasar ; C. Kuckein ; S.J. González Manrique ; M. Sobotka ; N. Bello González ; S. Hoch ; A. Diercke ; P. Kummerow ; T. Berkefeld ; M. Collados ; A. Feller ; A. Hofmann ; F.Kneer ; A. Lagg ; J. Löhner-Böttcher ; H. Nicklas ; A. Pastor Yabar ; R. Schlichenmaier ; D. Schmidt ; W. Schmidt ; M. Schubert ; M. Sigwarth ; S.K. Solanki ; D. Soltau ; J. Staude ; K.G. Strassmeier ; R. Volkmer ; O. von der Lühe ; T. Waldmann ;
Date:	3 Mar 2016
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.
Source:	arXiv, 1603.1109
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