edu.ucar.opensky::articles:19672 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T02:33:15.232205 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7dr2x9d Morphological properties of slender Ca II H fibrils observed by Sunrise II 2017-03-24T00:00:00Z publication https://n2t.org/ark:/85065/d7dr2x9d https://doi.org/10.3847/1538-4365/229/1/6 Gafeira, R. author Lagg, A. author Solanki, S. K. author Jafarzadeh, S. author Noort, M. v. author Barthol, P. author Rodríguez, J. B. author Iniesta, J. C. D. T. author Gandorfer, A. author Gizon, L. author Hirzberger, J. author Knölker, Michael author Suárez, D. O. author Riethmüller, T. L. author Schmidt, W. author UCAR/NCAR - Library publisher 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 approximate to 400 s, and average curvature of 0.002 arcsec(-1). The maximum lifetime of the SCFs within our time series of 57 minutes is approximate to 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. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2017 the American Astronomical Society. None eng geoscientificInformation