Slender Ca II H Fibrils Mapping Magnetic Fields in the Low Solar Chromosphere

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

Research output: Contribution to journalArticlepeer-review


A dense forest of slender bright fibrils near a small solar active region is seen in high-quality narrowband Ca ii H images from the SuFI instrument onboard the Sunrise balloon-borne solar observatory. The orientation of these slender Ca ii H fibrils (SCF) overlaps with the magnetic field configuration in the low solar chromosphere derived by magnetostatic extrapolation of the photospheric field observed with Sunrise/IMaX and SDO/HMI. In addition, many observed SCFs are qualitatively aligned with small-scale loops computed from a novel inversion approach based on best-fit numerical MHD simulation. Such loops are organized in canopy-like arches over quiet areas that differ in height depending on the field strength near their roots.

Original languageEnglish (US)
Article number11
JournalAstrophysical Journal, Supplement Series
Issue number1
StatePublished - Mar 2017


  • Sun: chromosphere
  • Sun: magnetic fields
  • methods: observational

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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