A Tale of Two Emergences

Sunrise II Observations of Emergence Sites in a Solar Active Region

R. Centeno, J. Blanco Rodríguez, J. C. Del Toro Iniesta, S. K. Solanki, P. Barthol, A. Gandorfer, Laurent Gizon, J. Hirzberger, T. L. Riethmüller, M. Van Noort, D. Orozco Suárez, T. Berkefeld, W. Schmidt, V. Martínez Pillet, M. Knölker

    Research output: Contribution to journalArticle

    Abstract

    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 (∼5) 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.

    Original languageEnglish (US)
    Article number3
    JournalAstrophysical Journal, Supplement Series
    Volume229
    Issue number1
    DOIs
    StatePublished - Mar 1 2017

    Fingerprint

    sunrise
    anchor
    filtergrams
    magnetic field
    plasma
    arches
    pushing
    solar atmosphere
    chromosphere
    dynamic response
    arch
    chutes
    magnetic fields
    travel
    luminaires
    line spectra
    magnetic flux
    emerging
    filaments
    sun

    Keywords

    • Sun: chromosphere
    • Sun: magnetic fields
    • Sun: photosphere
    • sunspots
    • techniques: polarimetric

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Centeno, R., Rodríguez, J. B., Del Toro Iniesta, J. C., Solanki, S. K., Barthol, P., Gandorfer, A., ... Knölker, M. (2017). A Tale of Two Emergences: Sunrise II Observations of Emergence Sites in a Solar Active Region. Astrophysical Journal, Supplement Series, 229(1), [3]. https://doi.org/10.3847/1538-4365/229/1/3

    A Tale of Two Emergences : Sunrise II Observations of Emergence Sites in a Solar Active Region. / Centeno, R.; Rodríguez, J. Blanco; Del Toro Iniesta, J. C.; Solanki, S. K.; Barthol, P.; Gandorfer, A.; Gizon, Laurent; Hirzberger, J.; Riethmüller, T. L.; Noort, M. Van; Suárez, D. Orozco; Berkefeld, T.; Schmidt, W.; Pillet, V. Martínez; Knölker, M.

    In: Astrophysical Journal, Supplement Series, Vol. 229, No. 1, 3, 01.03.2017.

    Research output: Contribution to journalArticle

    Centeno, R, Rodríguez, JB, Del Toro Iniesta, JC, Solanki, SK, Barthol, P, Gandorfer, A, Gizon, L, Hirzberger, J, Riethmüller, TL, Noort, MV, Suárez, DO, Berkefeld, T, Schmidt, W, Pillet, VM & Knölker, M 2017, 'A Tale of Two Emergences: Sunrise II Observations of Emergence Sites in a Solar Active Region', Astrophysical Journal, Supplement Series, vol. 229, no. 1, 3. https://doi.org/10.3847/1538-4365/229/1/3
    Centeno, R. ; Rodríguez, J. Blanco ; Del Toro Iniesta, J. C. ; Solanki, S. K. ; Barthol, P. ; Gandorfer, A. ; Gizon, Laurent ; Hirzberger, J. ; Riethmüller, T. L. ; Noort, M. Van ; Suárez, D. Orozco ; Berkefeld, T. ; Schmidt, W. ; Pillet, V. Martínez ; Knölker, M. / A Tale of Two Emergences : Sunrise II Observations of Emergence Sites in a Solar Active Region. In: Astrophysical Journal, Supplement Series. 2017 ; Vol. 229, No. 1.
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