TY - JOUR
T1 - Morphological Properties of Slender Ca Ca II H Fibrils Observed by SUNRISE II
AU - Gafeira, R.
AU - Lagg, A.
AU - Solanki, S. K.
AU - Jafarzadeh, S.
AU - Noort, M. Van
AU - Barthol, P.
AU - Rodríguez, J. Blanco
AU - Iniesta, J. C.Del Toro
AU - Gandorfer, A.
AU - Gizon, L.
AU - Hirzberger, J.
AU - Knölker, M.
AU - Suárez, D. Orozco
AU - Riethmüller, T. L.
AU - Schmidt, W.
N1 - Publisher Copyright:
© 2017. The American Astronomical Society. All rights reserved..
PY - 2017/3
Y1 - 2017/3
N2 - 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.
AB - 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.
KW - Sun: chromosphere
KW - Sun: magnetic fields
KW - techniques: imaging spectroscopy
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U2 - 10.3847/1538-4365/229/1/6
DO - 10.3847/1538-4365/229/1/6
M3 - Article
AN - SCOPUS:85016143853
SN - 0067-0049
VL - 229
JO - Astrophysical Journal, Supplement Series
JF - Astrophysical Journal, Supplement Series
IS - 1
M1 - 6
ER -