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Morphological Properties of Slender Ca H Fibrils Observed by Sunrise II

R. GafeiraMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]A. LaggMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]S. K. SolankiMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]S. JafarzadehInstitute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, NO-0315 Oslo, NorwayM. van NoortMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]P. BartholMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]J. Blanco RodríguezGrupo de Astronomía y Ciencias del Espacio, University of Valencia, P.O. Box 22085, E-46980 Paterna, Valencia, SpainJ. C. del Toro IniestaInstituto de Astrofísica de Andalucía (CSIC), Apartado de Correos 3004, E-18080 Granada, SpainA. GandorferMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]L. GizonInstitut für Astrophysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, GermanyJ. HirzbergerMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]M. KnölkerHigh Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000, USAD. Orozco SuárezInstituto de Astrofísica de Andalucía (CSIC), Apartado de Correos 3004, E-18080 Granada, SpainT. L. RiethmüllerMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany; [email protected]W. SchmidtKiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, D-79104 Freiburg, Germany

2017en

ABI

Annotatsiya

Abstract We use seeing-free high spatial resolution Ca ii H data obtained by the Sunrise observatory to determine properties of slender fibrils in the lower solar chromosphere. In this work we use intensity images taken with the SuFI instrument in the Ca ii H line during the second scientific flight of the Sunrise observatory to identify and track elongated bright structures. After identification, we analyze theses structures to extract their morphological properties. We identify 598 slender Ca ii H fibrils (SCFs) with an average width of around 180 km, length between 500 and 4000 km, average lifetime of ≈400 s, and average curvature of 0.002 arcsec −1 . The maximum lifetime of the SCFs within our time series of 57 minutes is ≈2000 s. We discuss similarities and differences of the SCFs with other small-scale, chromospheric structures such as spicules of type I and II, or Ca ii K fibrils.

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DOI: 10.3847/1538-4365/229/1/6

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