Morphological Properties of Slender Ca Ca II H Fibrils Observed by SUNRISE II

DOI: 
10.3847/1538-4365/229/1/6
Publication date: 
17/04/2017
Main author: 
Gafeira R.
IAA authors: 
Iniesta, J.C.D.T.;Suárez, D.O.
Authors: 
Gafeira R., Lagg A., Solanki S.K., Jafarzadeh S., Noort M.V., Barthol P., Rodríguez J.B., Iniesta J.C.D.T., Gandorfer A., Gizon L., Hirzberger J., Knölker M., Suárez D.O., Riethmüller T.L., Schmidt W.
Journal: 
Astrophysical Journal, Supplement Series
Refereed: 
Yes
Publication type: 
Article
Volume: 
229
Number: 
6
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. © 2017. The American Astronomical Society. All rights reserved..

Database: 
SCOPUS
ADS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016143853&doi=10.3847%2f1538-4365%2f229%2f1%2f6&partnerID=40&md5=c200b507b72c1e447aa50c4250ccd8bd
ADS Bibcode: 
2017ApJS..229....6G
Keywords: 
Sun: chromosphere; Sun: magnetic fields; techniques: imaging spectroscopy