A tale of two emergences: Sunrise II observations of emergence sites in a solar active region

Autor: R. Centeno, J. Blanco Rodríguez, J. C. Del Toro Iniesta, S. K. Solanki, P. Barthol, A. Gandorfer, L. Gizon, J. Hirzberger, T. L. Riethmüller, M. van Noort, D. Orozco Suárez, T. Berkefeld, W. Schmidt, V. Martínez Pillet, M. Knölker
Přispěvatelé: National Science Foundation (US), Max Planck Society, Ministerio de Economía y Competitividad (España), National Aeronautics and Space Administration (US), National Research Foundation of Korea
Jazyk: angličtina
Rok vydání: 2017
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Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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Popis: R. Centeno et. al.
©2017 The American Astronomical Society. All rights reserved. In 2013 June, the two scientific instruments on board the second Sunrise mission witnessed, in detail, a small-scale magnetic flux emergence event as part of the birth of an active region. The Imaging Magnetograph Experiment (IMaX) recorded two small ($\sim 5^{\prime\prime} $) emerging flux patches in the polarized filtergrams of a photospheric Fe i spectral line. Meanwhile, the Sunrise Filter Imager (SuFI) captured the highly dynamic chromospheric response to the magnetic fields pushing their way through the lower solar atmosphere. The serendipitous capture of this event offers a closer look at the inner workings of active region emergence sites. In particular, it reveals in meticulous detail how the rising magnetic fields interact with the granulation as they push through the Sun's surface, dragging photospheric plasma in their upward travel. The plasma that is burdening the rising field slides along the field lines, creating fast downflowing channels at the footpoints. The weight of this material anchors this field to the surface at semi-regular spatial intervals, shaping it in an undulatory fashion. Finally, magnetic reconnection enables the field to release itself from its photospheric anchors, allowing it to continue its voyage up to higher layers. This process releases energy that lights up the arch-filament systems and heats the surrounding chromosphere.
The National Center for Atmospheric Research is sponsored by the National Science Foundation.The German contribution to Sunrise and its reflight was funded by the Max Planck Foundation, the Strategic Innovations Fund of the President of the Max Planck Society (MPG), DLR, and private donations by supporting members of the Max Planck Society, which is gratefully acknowledged. The Spanish contribution was funded by the Ministerio de Economía y Competitividad under Projects ESP2013-47349-C6 and ESP2014-56169-C6, partially using European FEDER funds. The HAO contribution was partly funded through NASA grant number NNX13AE95G. This work was partly supported by the BK21 plus program through the National Research Foundation (NRF) funded by the Ministry of Education of Korea.
Databáze: OpenAIRE
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