Magneto-static Modeling from Sunrise/IMaX

Application to an Active Region Observed with Sunrise II

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

    Research output: Contribution to journalArticle

    Abstract

    Magneto-static models may overcome some of the issues facing force-free magnetic field extrapolations. So far they have seen limited use and have faced problems when applied to quiet-Sun data. Here we present a first application to an active region. We use solar vector magnetic field measurements gathered by the IMaX polarimeter during the flight of the Sunrise balloon-borne solar observatory in 2013 June as boundary conditions for a magneto-static model of the higher solar atmosphere above an active region. The IMaX data are embedded in active region vector magnetograms observed with SDO/HMI. This work continues our magneto-static extrapolation approach, which was applied earlier to a quiet-Sun region observed with Sunrise I. In an active region the signal-to-noise-ratio in the measured Stokes parameters is considerably higher than in the quiet-Sun and consequently the IMaX measurements of the horizontal photospheric magnetic field allow us to specify the free parameters of the model in a special class of linear magneto-static equilibria. The high spatial resolution of IMaX (110-130 km, pixel size 40 km) enables us to model the non-force-free layer between the photosphere and the mid-chromosphere vertically by about 50 grid points. In our approach we can incorporate some aspects of the mixed beta layer of photosphere and chromosphere, e.g., taking a finite Lorentz force into account, which was not possible with lower-resolution photospheric measurements in the past. The linear model does not, however, permit us to model intrinsic nonlinear structures like strongly localized electric currents.

    Original languageEnglish (US)
    Article number18
    JournalAstrophysical Journal, Supplement Series
    Volume229
    Issue number1
    DOIs
    StatePublished - Mar 1 2017

    Fingerprint

    sunrise
    static models
    sun
    chromosphere
    photosphere
    modeling
    extrapolation
    force-free magnetic fields
    magnetic field
    solar observatories
    magnetic signatures
    solar atmosphere
    Lorentz force
    polarimeters
    balloons
    electric current
    magnetic fields
    signal to noise ratios
    spatial resolution
    pixels

    Keywords

    • Sun: chromosphere
    • Sun: corona
    • Sun: magnetic fields
    • Sun: photosphere

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Wiegelmann, T., Neukirch, T., Nickeler, D. H., Solanki, S. K., Barthol, P., Gandorfer, A., ... Knölker, M. (2017). Magneto-static Modeling from Sunrise/IMaX: Application to an Active Region Observed with Sunrise II. Astrophysical Journal, Supplement Series, 229(1), [18]. https://doi.org/10.3847/1538-4365/aa582f

    Magneto-static Modeling from Sunrise/IMaX : Application to an Active Region Observed with Sunrise II. / Wiegelmann, T.; Neukirch, T.; Nickeler, D. H.; Solanki, S. K.; Barthol, P.; Gandorfer, A.; Gizon, Laurent; Hirzberger, J.; Riethmüller, T. L.; Noort, M. Van; Rodríguez, J. Blanco; Iniesta, J. C.Del Toro; Suárez, D. Orozco; Schmidt, W.; Pillet, V. Martínez; Knölker, M.

    In: Astrophysical Journal, Supplement Series, Vol. 229, No. 1, 18, 01.03.2017.

    Research output: Contribution to journalArticle

    Wiegelmann, T, Neukirch, T, Nickeler, DH, Solanki, SK, Barthol, P, Gandorfer, A, Gizon, L, Hirzberger, J, Riethmüller, TL, Noort, MV, Rodríguez, JB, Iniesta, JCDT, Suárez, DO, Schmidt, W, Pillet, VM & Knölker, M 2017, 'Magneto-static Modeling from Sunrise/IMaX: Application to an Active Region Observed with Sunrise II', Astrophysical Journal, Supplement Series, vol. 229, no. 1, 18. https://doi.org/10.3847/1538-4365/aa582f
    Wiegelmann, T. ; Neukirch, T. ; Nickeler, D. H. ; Solanki, S. K. ; Barthol, P. ; Gandorfer, A. ; Gizon, Laurent ; Hirzberger, J. ; Riethmüller, T. L. ; Noort, M. Van ; Rodríguez, J. Blanco ; Iniesta, J. C.Del Toro ; Suárez, D. Orozco ; Schmidt, W. ; Pillet, V. Martínez ; Knölker, M. / Magneto-static Modeling from Sunrise/IMaX : Application to an Active Region Observed with Sunrise II. In: Astrophysical Journal, Supplement Series. 2017 ; Vol. 229, No. 1.
    @article{5f2540fc5e1840939fc7c6293385cca9,
    title = "Magneto-static Modeling from Sunrise/IMaX: Application to an Active Region Observed with Sunrise II",
    abstract = "Magneto-static models may overcome some of the issues facing force-free magnetic field extrapolations. So far they have seen limited use and have faced problems when applied to quiet-Sun data. Here we present a first application to an active region. We use solar vector magnetic field measurements gathered by the IMaX polarimeter during the flight of the Sunrise balloon-borne solar observatory in 2013 June as boundary conditions for a magneto-static model of the higher solar atmosphere above an active region. The IMaX data are embedded in active region vector magnetograms observed with SDO/HMI. This work continues our magneto-static extrapolation approach, which was applied earlier to a quiet-Sun region observed with Sunrise I. In an active region the signal-to-noise-ratio in the measured Stokes parameters is considerably higher than in the quiet-Sun and consequently the IMaX measurements of the horizontal photospheric magnetic field allow us to specify the free parameters of the model in a special class of linear magneto-static equilibria. The high spatial resolution of IMaX (110-130 km, pixel size 40 km) enables us to model the non-force-free layer between the photosphere and the mid-chromosphere vertically by about 50 grid points. In our approach we can incorporate some aspects of the mixed beta layer of photosphere and chromosphere, e.g., taking a finite Lorentz force into account, which was not possible with lower-resolution photospheric measurements in the past. The linear model does not, however, permit us to model intrinsic nonlinear structures like strongly localized electric currents.",
    keywords = "Sun: chromosphere, Sun: corona, Sun: magnetic fields, Sun: photosphere",
    author = "T. Wiegelmann and T. Neukirch and Nickeler, {D. H.} and Solanki, {S. K.} and P. Barthol and A. Gandorfer and Laurent Gizon and J. Hirzberger and Riethm{\"u}ller, {T. L.} and Noort, {M. Van} and Rodr{\'i}guez, {J. Blanco} and Iniesta, {J. C.Del Toro} and Su{\'a}rez, {D. Orozco} and W. Schmidt and Pillet, {V. Mart{\'i}nez} and M. Kn{\"o}lker",
    year = "2017",
    month = "3",
    day = "1",
    doi = "10.3847/1538-4365/aa582f",
    language = "English (US)",
    volume = "229",
    journal = "Astrophysical Journal, Supplement Series",
    issn = "0067-0049",
    publisher = "IOP Publishing Ltd.",
    number = "1",

    }

    TY - JOUR

    T1 - Magneto-static Modeling from Sunrise/IMaX

    T2 - Application to an Active Region Observed with Sunrise II

    AU - Wiegelmann, T.

    AU - Neukirch, T.

    AU - Nickeler, D. H.

    AU - Solanki, S. K.

    AU - Barthol, P.

    AU - Gandorfer, A.

    AU - Gizon, Laurent

    AU - Hirzberger, J.

    AU - Riethmüller, T. L.

    AU - Noort, M. Van

    AU - Rodríguez, J. Blanco

    AU - Iniesta, J. C.Del Toro

    AU - Suárez, D. Orozco

    AU - Schmidt, W.

    AU - Pillet, V. Martínez

    AU - Knölker, M.

    PY - 2017/3/1

    Y1 - 2017/3/1

    N2 - Magneto-static models may overcome some of the issues facing force-free magnetic field extrapolations. So far they have seen limited use and have faced problems when applied to quiet-Sun data. Here we present a first application to an active region. We use solar vector magnetic field measurements gathered by the IMaX polarimeter during the flight of the Sunrise balloon-borne solar observatory in 2013 June as boundary conditions for a magneto-static model of the higher solar atmosphere above an active region. The IMaX data are embedded in active region vector magnetograms observed with SDO/HMI. This work continues our magneto-static extrapolation approach, which was applied earlier to a quiet-Sun region observed with Sunrise I. In an active region the signal-to-noise-ratio in the measured Stokes parameters is considerably higher than in the quiet-Sun and consequently the IMaX measurements of the horizontal photospheric magnetic field allow us to specify the free parameters of the model in a special class of linear magneto-static equilibria. The high spatial resolution of IMaX (110-130 km, pixel size 40 km) enables us to model the non-force-free layer between the photosphere and the mid-chromosphere vertically by about 50 grid points. In our approach we can incorporate some aspects of the mixed beta layer of photosphere and chromosphere, e.g., taking a finite Lorentz force into account, which was not possible with lower-resolution photospheric measurements in the past. The linear model does not, however, permit us to model intrinsic nonlinear structures like strongly localized electric currents.

    AB - Magneto-static models may overcome some of the issues facing force-free magnetic field extrapolations. So far they have seen limited use and have faced problems when applied to quiet-Sun data. Here we present a first application to an active region. We use solar vector magnetic field measurements gathered by the IMaX polarimeter during the flight of the Sunrise balloon-borne solar observatory in 2013 June as boundary conditions for a magneto-static model of the higher solar atmosphere above an active region. The IMaX data are embedded in active region vector magnetograms observed with SDO/HMI. This work continues our magneto-static extrapolation approach, which was applied earlier to a quiet-Sun region observed with Sunrise I. In an active region the signal-to-noise-ratio in the measured Stokes parameters is considerably higher than in the quiet-Sun and consequently the IMaX measurements of the horizontal photospheric magnetic field allow us to specify the free parameters of the model in a special class of linear magneto-static equilibria. The high spatial resolution of IMaX (110-130 km, pixel size 40 km) enables us to model the non-force-free layer between the photosphere and the mid-chromosphere vertically by about 50 grid points. In our approach we can incorporate some aspects of the mixed beta layer of photosphere and chromosphere, e.g., taking a finite Lorentz force into account, which was not possible with lower-resolution photospheric measurements in the past. The linear model does not, however, permit us to model intrinsic nonlinear structures like strongly localized electric currents.

    KW - Sun: chromosphere

    KW - Sun: corona

    KW - Sun: magnetic fields

    KW - Sun: photosphere

    UR - http://www.scopus.com/inward/record.url?scp=85016149870&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85016149870&partnerID=8YFLogxK

    U2 - 10.3847/1538-4365/aa582f

    DO - 10.3847/1538-4365/aa582f

    M3 - Article

    VL - 229

    JO - Astrophysical Journal, Supplement Series

    JF - Astrophysical Journal, Supplement Series

    SN - 0067-0049

    IS - 1

    M1 - 18

    ER -